The difference between DNA and RNA is that RNA consists of a double-stranded helix of sugars, phosphate groups, and nitrogenous bases. true or false

Answer:

synoptic cleft

Explanation:

synoptic cleft is the space in between the two neurons

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.

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

Answer:

c. the prospective parents

Explanation:

Based on the information provided within the question it can be said that in this scenario the decision of whether or not the couple should try to conceive is ultimately decided by the prospective parents. This is because they are the ones who will conceive the baby and will have to take care of the baby for as long as they live. Making sure that the baby has all that it needs in order to be as happy and healthy as possible.

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.

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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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.

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

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.

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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Answer: RESPIRATORY ORGAN

Explanation:

Respiratory failure is common in the first 72 hours. Subsequently, one might see liver failure (5–7 days), gastrointestinal bleeding (10–15 days) and kidney failure (11–17 days).

Answer: False

Explanation:

Anaerobic means the absence of oxygen while aerobic means the present of oxygen. Anaerobic exercise do not utilize oxygen as energy source, it uses energy from the break down of glucose in the muscles. This exercise is of short length, fast and of high-intensity. A lot of energy is released within a small period of time.

Biologically anaerobic exercise must be fueled using glucose through a process called glycolysis in the muscles cells.

The break down of glucose during high-intensity training without oxygen, producing energy quickly. Because it occurs in the absence of oxygen this process also produces lactate, which is the metabolic fate if glucose in anaerobic condition.

High concentration of lactate is the reason why your muscles get so tired after the energy burst.

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.

Question is incomplete i have added full question in ask for detail section.

Answer:

Option a. altruism is correct.

Explanation:

Altruism is "the belief in or practice of disinterested and selfless concern for the well-being of others" (More detail in attached info graph)

Moreover, Yalom's eleven Therapeutic Factors are: (More detail in attached info graph)

According to Yalom (2005), altruism in group psychotherapy correlates with learning to give to others. It provides members with a sense of value and significance. Option c is correct.

Complete question as follows:

According to Yalom (2005), there are 11 therapeutic factors through which changes occur in group psychotherapy. Which factor correlates with learning to give to others?

a. catharsis

b. group cohesiveness c. altruism d. universality

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.

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.

Answer:

The correct answer is "B"  ACh

Explanation:

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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.

Answer:

A. An OH group from one component and an H atom from the other form a water molecule.

C. Monomers or polymers are joined to form longer chains.

Explanation:

Dehydration reactions are the ones in which a water molecule is released during the formation of a covalent bond. Since these are "synthesis" reactions, complex molecules are formed from the simpler monomers. Therefore, dehydration synthesis refers to the reactions that form complex polymers by joining the monomers together.

For example, when a peptide bond is formed between two amino acids, OH group from one amino acid and "H" from the other amino acid join together and are released in the form of "H2O". A covalent bond is formed between the two amino acids. many amino acids are joined together in this way to form long polypeptide chains.

Dehydration synthesis involves the formation of longer chains by joining monomers or polymers together, accompanied by the removal of a water molecule.

The two statements that are true about dehydration synthesis are:

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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.

Answer:

The correct answer is - incomplete dominance.

Explanation:

A inheritance pattern that is characterized by pattern in which the one allele is not completely dominant over the its recessive variant of the allele and due to its incomplete dominance a third phenotype expressed over, termed as the incomplete dominance.

In the case of the familial hypercholesterlemia, it is genetic disorder in which the individual lacks the receptors on liver cells remove cholesterol from the blood. This condition occur in the homozygous allele case. In normal people have receptors normal while in heterozygous condition individual have half of the total receptors.

Thus, it is the case of incomplete dominance.

Answer:

The answer is directional selection.

Explanation:

Selection types can be given as stabilizing, disruptive and directional selection and the example given in the question is an example of directional selection.

In directional selection, the phenotypes of the species take role in determining their chances of survival and in this situation the one will have the advantage over the other species in terms of survival because they were initially living in different conditions therefore they will experience directional selection but in opposite directions meaning one will have a positive impact and the other negative.

I hope this answer helps.

Building a canal between a predator-rich and predator-poor pond will likely cause directional selection among mosquitofish in both ponds, favoring traits that help avoid predation.

When a canal is built that links a predator-rich pond to a predator-poor pond, it creates an opportunity for predators and prey species to move between these two environments. For the mosquitofish in the original predator-rich pond, the introduction of this new link may lead to directional selection. This type of selection will favor the mosquitofish traits that are better at evading predators, perhaps leading to faster or more agile fish that can escape predation. Meanwhile, in the formerly predator-poor pond, the mosquitofish there may soon experience an increase in predation pressure due to the movement of predators through the canal.

The result could be a shift in mosquitofish populations towards traits that improve survival in the presence of predators, such as more drab coloration or behaviors that make them less noticeable. This change aligns with findings from studies by John Endler and others, suggesting that predation pressure can significantly alter the physical and behavioral characteristics of prey species. Both disruptive selection and assortative mating may also come into play, as different traits become advantageous in the new shared environment of the canal-linked ponds.

Answer:

The correct answer is - temperature.

Explanation:

These cats have an enzyme that acts on the body temperature of the body. Siamese cats are characterized by the dark and light regions on their fur. The dark region is present on the cooler side of the body of the cat due to the formation of dark pigment.

The dark pigment formation occurs due to the specific enzymes that are affected by the temperature because the pigment is active on the cool temperature in cats.

Thus, the correct answer is - temperature.  

Answer:

By temperature

Explanation:

Enzymes like proteins are affected by temperature change.

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.

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

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.

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.

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.

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.

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

Thus, When the neuron is at rest, the primarily responsible for moving potassium ions OUT of the cell - concentration gradient

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Answer:

One of the probable ways to determine how long ago any two species of bacteria diverged from each other is by drawing a phylogenetic tree.

Explanation:

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.

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