Answer:
The options
A. Marsupial and placental mammals live in different habitats. Monkeys could only survive in the western islands and kangaroos in the eastern islands.
B. Monkeys and tree kangaroos compete against one another and cannot live together.
C. God specially created monkeys on one set of islands and kangaroos on the other.
D. The western islands were once connected to Asia and the eastern islands had been connected to Australia. The islands had never been connected to eachother.
The CORRECT ANSWER IS D.
D. The western islands were once connected to Asia and the eastern islands had been connected to Australia. The islands had never been connected to eachother.
Explanation:
Several forms of animals were restricted to several regions as a result of species that originated from pre-existing, nearby species. Since, the western islands were once all connected, they would possess or show the same species, which are also observed in the mainland in Asia. The eastern islands happened to be once all connected and had the same species, which is located in Australia
Answer:
Through the movements of the continents.
Explanation:
Alfred Russel Wallace was a British scientist who researched evolution and natural selection around the same time as Darwin and some of his papers were published together with Darwin.
The given example in the question, why the western islands had mammals and the eastern islands did not was explained by Wallace as "because the islands were never connected by land before throughout the movements of the continents in the history of the world and therefore the species never had the chance to cross to other islands and evolved seperately."
I hope this answer helps.
explain how the two-point discrimination test illustrates how the density of touch receptors in a receptive field varies in different areas of the body?
Answer:
By experimenting and comparing the results on different body parts.
Explanation:
The "Two Point Discrimination Test" is designed to illustrate the density of touch sensitive receptors for different parts on our body and our ability to tell if there are two distinct objects that we are touching or not.
The density of touch receptors in different receptive fields on our body can be our hands and our back for example, the receptive field density is much more higher in our hands for evolutionary reasons so we are able to more easily tell two distinct objects apart that we are touching with our hands.
I hope this answer helps.
The two-point discrimination test measures the density of touch receptors in different areas of the body. It involves simultaneously touching the skin with two points and asking the patient to indicate whether they feel one or two stimuli.
Explanation:The two-point discrimination test is used to measure the density of touch receptors in different areas of the body. It involves touching the skin with two points simultaneously and asking the patient to indicate whether they feel one or two stimuli. The areas of the body with higher density of touch receptors, such as the fingertips, will have a smaller distance threshold for distinguishing two points compared to areas with lower density, such as the arms or legs.
For example, if two points can be distinguished when they are 2 mm apart on the fingertips, but can only be distinguished when they are 10 mm apart on the arms, it indicates that the density of touch receptors is higher in the fingertips. This test demonstrates how the density of touch receptors in a receptive field varies in different areas of the body.
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Complete the statement with the correct word.
______________ standards provide guidelines for employee safety and protection from all hazards.
OSHA Standards are rules that describe the method that employers must use to protect their employees from hazards.
Occupational Safety & Health Administration (OSHA) Is a government agency in the US which is responsible for maintaining standards of health and safety in work places.
HOPE IT HELPS.
Final answer:
The statement is completed by the term 'OSHA standards,' which provide guidelines for worker safety against a range of hazards across different sectors, as mandated by the Occupational Safety and Health Administration.
Explanation:
The correct word to complete the statement is OSHA standards.
OSHA standards provide guidelines for employee safety and protection from all hazards. These standards are designed to protect workers in various sectors, including Construction, General Industry, Maritime, and Agriculture. They ensure measures such as fall protection, precautions against trenching cave-ins, preventing exposure to infectious diseases and harmful chemicals, and the requirement for safety training are implemented.
Employers are also bound by the General Duty Clause of the OSH Act to keep workplaces free from serious recognized hazards, even when no specific OSHA standard applies. Furthermore, OSHA's role includes promulgating standards that prescribe the methods employers are required to follow to safeguard their workers from hazards, demonstrated by a significant risk to workers and that there are feasible measures employers can take.
Which degree of tilt produced light similar to what North America experiences in summer? Explain your answer.
The degree of tilt producing light similar to North America experiencing summer is 23.5 degrees
Explanation:
The Earth tilts on an imaginary line tilted at 23.5 degrees on its own axis of rotation. As the earth revolves on its own and rotates on its own orbit around the sun, different parts of the Earth receives varied concentration of sunlight at different time periods of the year.
The angle of tilt of sunlight directly affect the light intensity.
Around June 21, the Earth's north pole tilt 23.5 degrees towards the sun and experiences summer like in North America.
This is due to the summer solistice of the earth and June 21 is considered to be the longest summer day in northern hemisphere.
During the Carboniferous period, forests consisting mainly of produced vast quantities of organic matter, which was buried and later became coal. A) giant woody mosses C) ferns and other seedless plants B) gymnosperms D) angiosperms
Answer:
Option (C)
Explanation:
The Carboniferous period is one of the important periods of the Paleozoic era, which started about 360 million years back and ended by about 300 million years back.
The Carboniferous period is characterized by the presence of swampy forests, where the dominant plants were the ferns, club mosses, some primitive conifers and other types of seedless plants.
These plants were abundantly present covering a large portion and comprised of vast quantities of organic matter, which were later buried and transformed into the Carboniferous coal.
Thus, the correct answer is option (C).
Final answer:
During the Carboniferous period, forests of ferns and other seedless vascular plants like club mosses and horsetails contributed to the formation of coal deposits.
Explanation:
During the Carboniferous period, forests consisting mainly of ferns and other seedless plants produced vast quantities of organic matter, which was buried and later became coal. Vast swamp forests of club mosses and horsetails, some reaching heights of more than 30 meters, were prevalent. These plants had evolved vascular tissues, well-defined leaves, and root systems, which allowed them to grow large and become major contributors to the coal deposits that characterize the Carboniferous period. As seedless vascular plants, the sporophyte generation became dominant in these species, and the massive amounts of carbon they deposited eventually turned into coal.
Steroid hormones and thyroid hormones ________ pass across the plasma membrane; they cause the target cells to ________ that produce the characteristic effects of the hormones.
Answer:
can ,synthesize specific proteins
Explanation:
Hormones are chemical signals secreted by animals and plant that are capable of regulating body activities and maintain homeostasis.
They are transported in the circulatory system of the body
The action of hormones can be seen after the hormone has bound to its specific receptor found inside the cell.
For instance, steroid hormone and the thyroid hormones can pass through the plasma membrane to their receptors inside the cells.
When they bind with their receptors, the target cells will synthesize specific proteins that produce the characteristic effect of the hormone.
______________ are agents (e.g., chemicals, viruses) that can reach the embryo or fetus and cause it harm.
Answer:
These agents are known as teratogens.
Explanation:
Teratogens impair or cause abnormal development and growth of the embryos or fetuses exposed to them. During prenatal development, the embryonic stage is the most susceptible to teratogens because at this time there is formation of major organs and limb buds. Birth defects are a common sign of such exposure.
After suffering an accidental brain injury, Kira has difficulty walking in a smooth and coordinated manner. She has probably suffered damage to her a. corpus callosum. b. hypothalamus. c. amygdala d. cerebellum.
Answer:
d. cerebellum.
Explanation:
The cerebellum, which is part of the hindbrain, is a small structure made of a covering of white cortex found under the hemispheres of the cerebral cortex. The cerebellum plays a major role in the control and coordination of all physical movements such as balance, control, etc, that has to deal with smooth and balanced activities of the muscle.
A damage to the cerebellum would most likely lead to impaired motor coordination, staggering, inability to judge distance or when to stop.
The cerebellum, located at the base of the brain, is pivotal for maintaining balance and coordinating voluntary movements. Damage to this area can result in a lack of muscle coordination during voluntary movements, therefore, Kira's issue with smooth walking and coordinated movements suggest damage to her cerebellum.
Explanation:After suffering an accidental brain injury, it seems that Kira is having trouble with coordinated movements and smooth walking. This suggests damage to her cerebellum. The cerebellum, located at the base of the brain, is pivotal in maintaining balance and coordinating voluntary movements. Damage to this area can result in a condition known as ataxia, characterized by lack of muscle coordination during voluntary movements such as walking or picking up objects. Neither the corpus callosum, amygdala, nor hypothalamus would produce these specific symptoms when damaged.
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In Black Boy, the young Richard Wright associates the bitterness and pain he feels over being abandoned by his father with __________.
Answer:
the pain he feels when he is hungry
Explanation:
Black Boy is a memoir that was written by the author Richard Wright in which he describes in detail what it was like for him growing up in the South as well as moving to Chicago in order to start his career. In this memoir he associates the bitterness and pain he feels over being abandoned by his father with the pain he feels when he is hungry
In the early 20th century, psychology focused on subjective information. The development of behaviorism shifted the focus of psychology to:
Answer:
Objective
Explanation:
In psychology, objectivity is something that is not influenced by emotions or feeling therefore it is based on facts.
Therefore, objective psychology would refer to an approach that is based on quantitative and measurable behaviorism.
In the early 20th century, it was based on subjective information. This was the opposite of objective where personal perspectives, feelings and opinions were used in decision making.
In Drosophila melanogaster, ebony body color is determined by the e allele. The e' allele produces the wild type honey-colored body. In heterozygotes for the two alleles, a dark marking called the trident can be seen on the thorax, but otherwise, the body is honey-colored. The e' allele is thus considered to be incompletely dominant to the eallele. When female e' e' flies are crossed to male e' eflies, what is the probability that progeny will have the trident marking? Animals with the marking mate among themselves. Of 300 progeny, how many would be expected to have a trident, how many would have ebony bodies, and how many would have honey-colored bodies?
Answer:
a) 50% or 0.5
b) trident marking = 150
honey colour = 75
ebony colour = 75
Explanation:
Given,
e'e' = wild type honey colour
e'e = honey colour with trident
ee = ebony colour
a) e'e' X e'e :
e' e'
e' e'e' e'e'
e e'e e'e
50 % of the progeny has e'e genotype so 50% of the progeny will have trident marking.
b) e'e X e'e :
e' e
e' e'e' e'e
e e'e ee
50 % of the progeny has e'e genotype so 50% of the progeny will have trident marking = 300 * 0.5 = 150
25% of the progeny has e'e' genotype so 25% of the progeny will have honey colour = 300*0.25 = 75
25% of the progeny has ee genotype so 25% of the progeny will have ebony colour = 300*0.25 = 75
Final answer:
In a cross between female e' e' and male e' e Drosophila melanogaster flies, 50% of the progeny (150 out of 300) are expected to have the trident marking, showing incomplete dominance of the e' allele over the e allele. Additionally, 75 would have honey-colored bodies, and another 75 would display ebony bodies.
Explanation:
The question about Drosophila melanogaster, specifically regarding the inheritance of the ebony body color and the trident marking, falls under genetics, a branch of biology. When female e' e' flies are crossed with male e' e flies, the offspring can have either e' e', e' e, or e e genotypes. The e' allele is incompletely dominant over the e allele, meaning that heterozygotes (e' e) will have the distinct trident marking on the thorax with a honey-colored body. Thus, when these heterozygotes mate among themselves, the expected genotypic ratio in their progeny would be 1:2:1 (e' e':e' e:e e).
Given that information, for 300 progeny:
25% (75) would be expected to have a honey-colored body (e' e' genotype), with no trident marking.50% (150) would have the trident marking (e' e genotype), showing incomplete dominance.25% (75) would display an ebony body (e e genotype), as this trait is recessive.
The basic units of the brain and spinal cord that process, store, and transmit information are the _____.
Answer:
Neuron
Explanation:
This is the applicable unit calculation for actions in which are taken within the brain and spine. Neurons allow the transfer of information, allowing us to move our body in a desired form
Answer:Central Nervous System
Explanation: The central nervous system is the basic Unit of spinal cord and Brain. Its regulates body activities. The brain is responsible for integrating most information and coordinating body functions.
In a hypothetical environment, fishes called pike-cichlids are visual predators of algae-eating fish, i.e., they locate their prey by sight. If a population o algae eaters experiences predation pressure from pike-cichlids, which of the following would least likely be observed in the algae-eater population over the course of many generations? Please note this is asking least likely.
a. Female algae eaters may become larger, bearing broods composed of more, and larger young.
b. The algae eaters may become sexually mature at smaller overall body sizes
c. The algae eaters may become nocturnal (active only at night).
d. Coloration of the algae eaters may become drab.
e. The algae eaters may become faster swimmers
Explanation:
The predators prey by sight, and the larger size of the female algae eaters is a conspicious trait, hence the fishes will be easily identify by the predators. As the larger fishes which are female possess a better broods plays an important role in restoring the wiped out preyed animals population. As, It is said that algae eater population which is under the predation pressure, the population of broods which are large in size will be increased only if the predators free the fishes which are large in size. This shows that these would be less likely be seen in the algae eater population.
Final answer:
In the context of predation pressure from pike-cichlids, the least likely change in algae-eater fish over generations would be females becoming larger with more and larger young, as adaptations usually focus on survival traits such as smaller size, nocturnal habits, camouflage, or increased speed.
Explanation:
In a hypothetical environment where pike-cichlids are visual predators of algae-eating fish, over many generations, the least likely observation in the algae-eater population due to predation pressure would be "a. Female algae eaters may become larger, bearing broods composed of more, and larger young." This outcome is less likely because under predation pressure, organisms often evolve traits that directly mitigate the risk of predation, such as becoming sexually mature at smaller sizes, adopting nocturnal habits, drab coloration for camouflage, or becoming faster swimmers. These traits help evade predators or minimize visibility to them. In contrast, larger size and greater reproductive output might not confer an immediate survival advantage under high predation pressure and could even make the algae eaters more conspicuous to their predators. The proposed changes would be examples of evolutionary responses to predation, aiming to enhance survival rather than reproductive output under threat.
The combustion of 1.881 g of glucose, C 6 H 12 O 6 ( s ) , in a bomb calorimeter with a heat capacity of 4.90 kJ/°C results in an increase in the temperature of the calorimeter and its contents from 22.06 °C to 28.04 °C. What is the internal energy change, Δ U , for the combustion of 1.881 g of glucose?
Answer:
ΔU = - 2804.02 kJ/mol
Explanation:
The equation for the reaction is:
C₆H₁₂O₆(s) + 6O₂ (g) ⇒ 6CO₂(g) + 6H₂O(l)
Given that:
Calorimeter heat capacity [tex](q_{cal}) =4.90kJ/^0C[/tex]
change in temperature = [tex](\delta T) = 28.04^0C-22.06^0C\\(\delta T) = 5.98^0C[/tex]
mass of glucose = 1.881 g
molar mass of glucose = 180 g/mol
number of moles of glucose = [tex]\frac{mass of glucose}{molar mass of glucose}[/tex]
number of moles of glucose = [tex]\frac{1.881g}{180g/mol}[/tex]
number of moles of glucose = 0.01045 mole
The heat absorbed (q) by the calorimeter is calculated as follows:
Heat absorbed = Heat capacity × change in temperature
[tex]\delta H = q* \delta T[/tex]
= 4.90 × 5.98°C
= 29.302 kJ
Enthalpy of combustion can be calculated as:
[tex]\delta H_c=-\frac{q}{n}[/tex]
where; n = number of moles of glucose = 0.01045 mole
[tex]\delta H_c=-\frac{29.032kJ}{0.01045mol}[/tex]
[tex]\delta H_c=- 2804.019 kJ/mol[/tex]
ΔH = - 2804.02 kJ/mol
The change in internal energy ΔU can be calculated as:
ΔH = ΔU + ΔnRT
where Δn = difference in number of moles of species in of product minus that of reactant; in that case, we have:
(6 - 6) = 0
ΔH = ΔU + ΔnRT
- 2804.02 kJ/mol = ΔU + (0 × R × T)
- 2804.02 kJ/mol = ΔU + 0
- ΔU = 2804.02 kJ/mol
ΔU = - 2804.02 kJ/mol
Answer:
2804.02 kJ/mol.
Explanation:
Equation of reaction:
C6H12O6 + 6O2 --> 6CO2(g) + 6H2O(g)
Molar mass of C6H12O6 = (6*12) + (12*1) + (6*16)
= 180 g/mol
Number of moles = mass/molar mass
= 1.881/180
= 0.01045 mol.
ΔU = q + W
W = 0,
ΔU = q
ΔT = 28.04 - 22.06
= 5.98 °C
qrxn = qcal;
qcal = Ccal * ΔT
= 4.9 * 5.98
= 29.302 kJ
ΔU = qcal/n
= 29.302/0.01045
= 2804.02 kJ/mol.
In New York City, Mayor Michael Bloomberg has recently recommend that the city, with the help of private donors, make cash payments to poor and underprivileged parents who can certify that their children are attending school on a regular basis. The payments would start after third grade and go through high school, rising each year as dropout rates get higher and a child's forgone earning potential is higher. What economic concept does this policy represent?
Answer:
Incentives
Explanation:
An incentive is something that promotes motivation to a people to behave a certain way.
The preferences can be their needs, wants or desires.
In this case, the New York county mayor with the help of private donors are making cash payouts to poor and under privileged who can certify that their children are going to school.
The cash payouts is a motivation since the poor parents do not have money.
They are motivated to take their children to school something the city mayor wants.
The image shows a volcanic eruption. Clouds of ash above an erupting volcano. Which statement best describes this eruption? This eruption is quiet. This eruption is explosive. This eruption was caused by low-viscosity magma. This eruption may set its surroundings on fire.
Answer:
B. Eruption is Explosive.
Explanation:
The statement best describes this eruption - This eruption is explosive.
Volcanic eruptionsA volcanic eruption can be of various types determined mostly by the silica content of the magma, and the amount of gas it contains, however on the activity these are either explosive eruptions or effusive eruptions.
Explosive eruptions are gas-driven explosions that propel magma sending ash, gas, and magma high up into the atmosphere.
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DNA replication involves producing new copies of DNA molecules. How many individual DNA strands exist after one molecule of DNA has been replicated? A. 3 B. 4 C. 2 D. 1
After one molecule of DNA has been replicated, there are four individual DNA strands.
Because during DNA replication, two strands of the parent DNA are unwound and copied to synthesize two new complementary strands, resulting in the formation of two separate double-stranded DNA molecules.
Part A The mandibular condyle __________. The mandibular condyle __________. is the opening through which blood vessels and nerves to the lower lip and skin of the chin pass is the line of fusion between the two halves of the mandible articulates with the temporal bone to form the temporomandibular joint is the opening through which the alveolar nerve passes is the site of insertion for the temporalis muscle.
Answer: Articulates with the temporal bone to form the temporo-mandibular joint.
Explanation:
The mandibular condyle articulates with the temporal bone at the mandibular fossa. The temporal bone consists of concave depression at the squamous portion.
The mandibular condyle and the temporal bone are separated by the articular disc, it divides the joint into two distinct type of compartments. The function of the temporomandibular joint is to connect the jaw bone with the skull.
The mandibular condyle is the part of the mandible that articulates with the temporal bone to form the temporomandibular joint.
Explanation:The mandibular condyle is a crucial anatomical structure in the human skull, located at the posterior end of the lower jawbone (mandible). It forms the rounded, articulating portion that connects with the temporal bone of the skull, allowing for the jaw's movement during activities such as chewing, talking, and swallowing.
The mandibular condyle is the part of the mandible that articulates with the temporal bone to form the temporomandibular joint. It allows for movements of the lower jaw, including elevation/depression, protraction/retraction, and side-to-side motion. The mandibular condyle moves forward and downward during the opening of the mouth.
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Identify and describe the three periods of prenatal development. Briefly describe what occurs in each period.
Explanation:
Development happens quickly during the prenatal period, which is the time between conception and birth. This period is generally divided into three stages: the germinal stage, the embryonic stage, and the fetal stage.
First or the germinal stage- time span: conception at two weeks
development that occurs: the key steps in establishing a pregnancy
Second or the embryonic stage - time span: third through eighth week
development that occurs: the face, eyes, ears, limbs and bones begin to form
Third or the fetal stage- time span: eighth or ninth week through birth
development that occurs: the vocal cords develop, and the digestive system and kidneys begin to function. spontaneous or unplanned, movements are possible by the end of the third month
The three periods of prenatal development are the germinal period, embryonic period, and fetal period. In the germinal period, the zygote undergoes cell division and implants into the uterine wall. In the embryonic period, major organs and body systems begin to form. In the fetal period, the fetus grows and matures.
Explanation:The first period of prenatal development is the germinal period, which lasts for about two weeks after fertilization. During this period, the zygote undergoes cell division and implants itself into the uterine wall.The second period is the embryonic period, which lasts from the third week to the eighth week of pregnancy. This is a critical period of development when the major organs and body systems begin to form.The third period is the fetal period, which begins at the end of the eighth week and continues until birth. During this period, the fetus grows and matures, and its organs and systems become fully functional.Learn more about Prenatal Development here:https://brainly.com/question/33443060
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Which of the following statements is/are incorrect? 1. The nervous and endocrine systems act together to help to maintain homeostasis. 2. The nervous system acts through nerve impulses while the endocrine system uses hormones to control body activities. 3. The endocrine uses neurotransmitters for communication while the nervous system communicates using hormones. 4. Neurotransmitters and hormones may both exert effects by binding to target cell receptors. 5. The endocrine system responds slowly while the nervous system responds quickly.
Answer:
The incorrect statement is statement 3:
The endocrine uses neurotransmitters for communication while the nervous system communicates using hormones.
Explanation:
To explain this, let us look briefly at what the endocrine and nervous systems are.
Endocrine System
:
To explain this, let us look briefly at what the endocrine and nervous systems are.
Endocrine System: The endocrine system made up of an aggregate of glands that produce hormones (chemical messengers) and the effect of the hormones are seen on a target site. The endocrine gland is responsible for the regulation of several activities in the body including metabolism, function of tissues, growth and development, sexual function, mood etc. Every time endocrine system is mentioned, the first thing that should come to your mind is hormones and chemicals. Hormones are chemical signals that are released directly into the blood stream causing regulation on a site called the target site.
Nervous System: The nervous system in an organism is responsible for coordination and it makes use of electric signals and neurotransmitters transmitted along nerve cells. At the point where two nerve cells meet (synaptic cleft) the electrical signals that have travelled through the length of the nerve cell called axon, are briefly converted to chemical signals which are called neurotransmitters. Neurotransmitters are used as messengers either between two neurons or between a neuron and a muscle. The effect of a neurotransmitter can be inhibitory, excitatory or modulatory.
All the other statements are correct because:
1. The nervous and endocrine systems act together to help to maintain homeostasis, and homeostasis is the regulating of the internal enviroment of an organism in order to maintain equilibrum.
2. The nervous system acts through nerve impulses while the endocrine system uses hormones to control body activities as I explained above.
4. Neurotransmitters and hormones may both exert effects by binding to target cell receptors. Binding to receptors by the neurotransmitters and hormones are the mechanisms of interaction with the target sites
5. The endocrine system responds slowly while the nervous system responds quickly. The nervous system use electric signals which travel very fast relative to hormones, which are secreted into the blood stream and travel to the target site through this means.
I suggest you read more on body systems to know their various compositions and functions so that you can answer the question yourself next time.
Final answer:
Statement 3 is incorrect because it states that the endocrine system uses neurotransmitters for communication, when in fact, it uses hormones. Both the nervous and endocrine systems are crucial in maintaining homeostasis and use chemical signals to communicate, with neurotransmitters being specific to the nervous system.
Explanation:
The question relates to the functions of the endocrine and nervous systems. To identify the incorrect statements, we must understand how these two systems operate and communicate within the body.
The first statement is correct; both systems do indeed play a role in maintaining homeostasis. The second statement is also correct; the nervous system communicates via nerve impulses, while the endocrine system uses hormones. The fourth statement is true as well; neurotransmitters and hormones exert their effects by binding to specific receptors on their target cells.
The fifth statement correctly highlights that the endocrine system typically responds more slowly compared to the instant reaction of the nervous system. However, the third statement is incorrect because the endocrine system uses hormones for communication, not neurotransmitters, which are used by the nervous system.
When the neuron is at rest, what is primarily responsible for moving potassium ions OUT of the cell?
When the neuron is at rest, what is primarily responsible for moving potassium ions OUT of the cell?
a concentration gradient
an electrical gradient
both a concentration gradient and an electrical gradient
the sodium-potassium pump
Answer:
a concentration gradient
Explanation:
At rest, the sodium-potassium pumps pump the two potassium ions into the cell for three Na ions moved out of the cell. This creates a higher potassium concentration gradient inside the cell. This concentration gradient moves the K+ out of the cell. Movement of positively charged K+ out of the cells make the inside of the membrane negative with respect to the outside. This is how the negative resting potential is maintained when neurons are nor firing the action potential.
When the neuron is at rest, the primarily responsible for moving potassium ions OUT of the cell - concentration gradient
Neuron Is the main component of nervous tissue in the nervous system as it sends signals by electro-chemical signaling.A neuron at rest is negatively charged within the cell is created by the cell membrane being more permeable to potassium ion movement than sodium ion movement.At rest, there is a high concentration of potassium ions (K+) inside the cell compared to the extracellular fluid due to a net movement with the concentration gradient.A High number of potassium ions reside inside the cell, a chemical gradient occurs and pushes potassium out of the cell.Thus, When the neuron is at rest, the primarily responsible for moving potassium ions OUT of the cell - concentration gradient
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You are in your laboratory studying a tumor. You want to see as many details about the structure of the tissue and its cells as possible to try to determine what caused the tumor’s development. You have the best microscope available. Check the option below that would allow you to see the greatest amount of detail
Answer:
Focus on the cells using high power.Explanation:
10x magnification of microscope, you can see a group of cells not an individual cell because for seeing individual cell, you have a microscope with a magnification of 100x.
What is cell?Cell is the basic structural and functional unit of living organisms. Cell are very tiny particles which cannot be seen through open eyes. It can only be seen with the help of microscope. Microscope is an instrument which is used for to see very small particles which cannot be seen through eyes. Magnification is the enlargement of small picture in order to see it clearly.
You are in your laboratory studying a tumor. You want to see as many details about the structure of the tissue and its cells as possible to try to determine what caused the tumor’s development. You have the best microscope available.
Therefore, 10x magnification of microscope, you can see a group of cells not an individual cell because for seeing individual cell, you have a microscope with a magnification of 100x.
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After his journey on the HMS Beagle, Darwin made this now-famous sketch in his notebook. Which ideas does it represent? A sketch made by Darwin. A line labeled 1 branches into three branches. These branches divide as well, and so on. Descendants of each of the initial branches are composed of a group labeled from A to D.
A. All species are connected to one another in a "family tree."
B. All species are linked to one another by common ancestry.
C. Species are constant and unchanging in their present forms.
D. Species are the product of special creation by God and not subject to natural laws.
E. Species descend from other species just as naturally as children come from parent.
Answer: A. All species are connected to one another in a "family tree."
B. All species are linked to one another by common ancestry.
E. Species descend from other species just as naturally as children come from parents.
Explanation:Charles Darwin is an English Scientist, who is also an Naturalist, Geologist. He is famous for the work he published in the year 1859 where he stated the law of evolution through which most evolutionary works in the field of science has been derived.
He stated in his Theory of Evolution that all species of living organisms evolve through the natural selection inherited variations that helps the living organism to compete, survive, and reproduce favorably. To Dawning these variations may be small and insignificant. This theory tend to see living organisms as having a common ancestry, United in the form of a family tree etc.
Nicole and Camille are synchronized swimmers for their college swim team. They often work long hours to ensure the movements in their routine are perfectly timed. What part of their brains must Camille and Nicole rely on most?
Answer: Camille and Nicole must rely on the cerebrum
Explanation:
Since Camille and Nicole are synchronized swimmers, there is no doubt that they will require the following:
- movement of legs and arms, which are voluntary actions controlled by the cerebrum
- proper reasoning and judgment for perfectly timed dives, which are controlled by the seat of intelligence - the cerebrum
- long hours of practice to perfect learning, and learning of information is also controlled by the cerebrum.
Thus, both Camille and Nicole must rely on the parts of the brain called cerebrum
Find the true statement. a. The horse is equally related to the hippo and the seal. b. The horse is more closely related to the seal than the hippo. c. The horse is more closely related to the hippo than the seal. d. All species are equally related.
Answer:
Option B
Explanation:
The remaining part of the question is attached as a image. Please see that
Solution
As we can see in the phylogenic tree (use to represent evolutionary relationship between organisms), that horse is more close to the seal however they two have the same recent ancestor. However, the inter relatedness among species arising from the same ancestors and without any further branching cannot be explained definitively because this tree structure is based on hypothesis and there is no exact timeline to measure anything.
In the Great Lakes, there are over 3,500 types of organisms that cannot produce offspring with each other. All of these different types of organisms create a wide variety of wildlife.
Which type of biodiversity does this example describe?
A
ecosystem diversity
B
genetic biodiversity
C
nutrient biodiversity
D
species biodiversity
Answer:
B
Explanation:
The genetics are the coding to the animals physique, so it only makes sense for the genetics to cause a variety of life.
Final answer:
In the case of the Great Lakes, the term that best describes the over 3,500 kinds of organisms which cannot interbreed is 'species biodiversity.' This refers to the diversity of different species within an ecosystem or across the Earth.
Explanation:
The example of over 3,500 types of organisms in the Great Lakes that cannot produce offspring with each other is a demonstration of species biodiversity. This term refers to the variety and abundance of different species in a certain ecosystem or on the Earth as a whole.
Genetic diversity is a related concept but refers to the variety of genes within a population, while ecosystem diversity is about different ecosystems and their interactions. The specified example does not pertain to genetic or ecosystem diversity, nor does it involve nutrient diversity which is not typically classified as a biodiversity type.
Therefore, the correct answer to the question is D, species biodiversity.
In what type of psychosurgery is a device like a pacemaker implanted into a part of the brain to send electrical impulses to that area of the brain? It is used primarily for Parkinson's disease, and major depression, although it can be used for a number of other disorders as well.
Answer: Deep brain Stimulation.
Explanation:
Deep brain stimulation DBS is a neurosurgical procedure in which , a device like pacemaker is implanted in the part of the brain which functions by sending the electrical impulses to the area of the brain.
This device is used in order to maintain the continuity of the electrical signals in many parts of the brain and body.
The diseases such as Parkinson's, depressions and other mental disorder is treated using this device.
You are given a 1 liter bacterial culture in exponential stage of growth. The generation time of the bacteria is known to be 30 minutes. When given to you the concentration of bacteria is 2x10^3 bacteria per ml (milliliter). Assuming space and nutrients are unlimited during your experiments. How many total bacteria would you after five hours of growth?
a. 2,048,000,000 bacteria
b. 4,096,000 bacteria
c. 1,024,000 bacteria
d. None of the answers given
e. 2,048,000 bacteria
f. 1,024,000,000 bacteria
Answer:
Option-A
Explanation:
A bacteria divides by binary fission which divides a parent bacteria into the two daughter cells and generation time refers to the average time difference between two consecutive generations.
The bacterial cell grows by the exponential function that is by [tex]2^{number of generation}[/tex] x initial population of bacteria.
In the given question,
Initial population
the initial population of bacteria - 2x 10³ per ml
So per liter, the bacterial population will be 2 x 10 ⁶
Generation time
1 generation time of bacteria is 30 min.
so 5 hours will have- [tex]\frac{300}{30}[/tex]= 10 generations
New bacterial population
Using formula [tex]2^{number of generation}[/tex] x initial population of bacteria
[tex]2^{10}[/tex] x (2 x 10⁶)
= 1048 x (2 x 10⁶)
2048 x 10⁶
Thus, Option-A is the correct answer.
After five hours of growth, the total number of bacteria would be A. 2,048,000,000.
To determine the total number of bacteria after five hours of growth, we need to understand the concept of exponential growth in bacteria and apply the relevant calculations step by step.
Step 1: Understand the Initial Conditions
You started with a concentration of bacteria: 2 x 10^3 bacteria/ml.
Since you have 1 liter of culture, we convert liters to milliliters:
1 liter = 1000 ml.
Therefore, the total number of bacteria initially is:
Initial number of bacteria = 2 x 10³, bacteria/ml x 1000 ml
= 2 x 10⁶ bacteria
Step 2: Determine the Doubling Time
The generation (doubling) time is given as 30 minutes.
To find out how many generations occur in five hours, first convert hours to minutes: 5 hours = 300 minutes.
The number of generations, [tex]n[/tex], can be calculated as:
[tex]n = \frac{\text{Total time}}{\text{Generation time}} = \frac{300 \, \text{minutes}}{30 \, \text{minutes/generation}} = 10 \text{ generations}[/tex]
Step 3: Calculate the Total Number of Bacteria
The formula for exponential growth is:
Final number of bacteria = Initial number x 2ⁿ
Substituting in the numbers:
Final number of bacteria = 2 x 10⁶ x 2¹⁰
We know that [tex]2^{10} = 1024[/tex], so:
Final number of bacteria = 2 x 10⁶ x 1024
= 2.048 x 10⁹
= 2,048,000,000 bacteria
"The interaction of nutrients and other substances in food in relation to maintenance, growth, reproduction, repair, and health of an organism" is the definition of which concept?
Answer:
Nutrition
Explanation:
Nutrition generally described as the study and analysis of the components that make up foods and how these components relate to growth, reproduction, healing and overall well-being of organisms that consume such foods.
It studies how the various components of foods interact and combine to produce certain effects on organisms.
The population that is mentally ill is arrested and prosecuted at a rate that is how many times that of the general population?
Answer:
4
Explanation:
Based on the information provided within the question it can be said that this population is arrested and prosecuted at a rate four times higher than that of the general population. This is mainly due to the fact that not everyone is well informed on the various different mental illnesses that exist and, since these illnesses cause individuals to break the law more often than the general population then they are arrested and prosecuted at a much higher rate.
Milton has been having considerable trouble with his short-term memory. His family has noticed a number of mistakes Milton has been making, such as leaving doors unlocked, getting lost in the neighborhood, and forgetting family members' names. It appears that his ________ -producing neurons are deteriorating.A. GABA
B. ACh
C. MSG
D. serotoning
Answer:
The correct answer is "B" ACh
Explanation:
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