Explanation:
The occurrence of new instances of ailment or injury in a populace over a predefined timeframe. Albeit a few disease transmission specialists use occurrence to mean the number of new cases in a network, others use frequency to mean the number of new cases per unit of population. The measure of a specific disease that is typically present in a network is alluded to as the pattern or endemic degree of the sickness. This level isn't really the ideal level, which may in truth be zero, but instead is the watched level. Without intercession and accepting that the level isn't sufficiently high to drain the pool of powerless people, the sickness may keep on happening at this level inconclusively. Along these lines, the gauge level is regularly viewed as the normal degree of the disease. While a few infections are so uncommon in a given populace that a solitary case warrants an epidemiologic examination (e.g., rabies, plague, polio), different sicknesses happen all the more usually with the goal that lone deviations from the standard warrant examination. Sporadic alludes to a sickness that happens rarely and irregularlyHence, the right answer is option a "the expected occurance of a disease based on past observations"
please help me with this
Answer:
Cell membrane present, ribosome present, lysosomes present, nuclear membrane present: Animals
Cell wall present, ribosomes present, nuclear membrane absent: Prokaryotic
Cell wall present, ribosome present, nucleus present, large vacuole present: Plants
Reproduces inside a cell, Nucleus absent, RNA present : Virus
Explanation:
Animals are multicellular organisms which do not possess cell wall. Hence option 1 represent animals.
Prokaryotes have cell wall but lack nuclear membrane. Hence, option 2 represents prokaryotes.
Plant cells have a cell wall, a nuclear membrane as well as a large nucleus. Hence option 3 is plants.
A cell with three pairs of chromosomes has the genotype Aa Bb Cc, with each locus on a different chromosome. If this cell were to undergo mitotic division, how many genetically different types of daughter cells could be produced?
Answer:
Same type of daughter cells
Explanation:
The process of mitosis form two daughter cells with the same number of chromosomes but the meiosis form four different daughter cells with a different number of chromosomes.
Also, the meiosis produces genetically different cell as the meiosis I is marked with the crossing over events which produces different genetic combination in the cell. In the given question, since the cell divides with the mitosis therefore the daughter cells will be produced with the same type of genetic material.
Thus, the same type of daughter cells is correct.
Retaining the zygote on the living gametophyte of land plants _____.
Answer: i would probaly go with C
Explanation:
In the reproduction of land plants, the zygote is retained within the gametophyte, which provides protection and resources for the growing embryo and developing sporophyte. This characteristic feature of embryophytes is vital for the protection of the vulnerable embryo from environmental hazards and is a unifying feature across all land plants.
Explanation:Retaining the zygote on the living gametophyte of land plants is a significant step in the reproductive cycle. This retention is a characteristic of all land plants, which are sometimes referred to as 'embryophytes' due to this very feature. The embryo that develops from the fertilized egg (zygote) remains attached to the gametophyte, not only ensuring a stable development environment with resources provided by the gametophyte but also protecting the developing sporophyte. Additionally, the female gametophyte sustains the zygote and eventually the young sporophyte, shielding it from environmental stressors like desiccation, further highlighting the critical role gametophytes play in nurturing the new generation of plants.
This process occurs in all plants and is analogous to the retention of the egg within the organism that produces it in some green algae. It is also observed in various other plant groups, where the entire female gametophyte is embedded in the diploid plant, a situation reminiscent of seed plants. The male gametophyte also shows retention, though temporarily, as microspores are kept within the microsporangium of the parent plant for initial development before being dispersed to complete its life cycle.
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The subdivision of the peripheral nervous system that consists of nerves that control all of the involuntary muscles, organs, and glands is called the ________ nervous system
Answer:
The Autonomic Nervous System is that part of PNS consisting of motor neurons that control internal organs. It has two subsystems. The autonomic system controls muscles in the heart, the smooth muscle in internal organs such as the intestine, bladder, and uterus.
The subdivision of the peripheral nervous system that controls involuntary muscles, organs, and glands is called the autonomic nervous system. It functions without our conscious awareness and is responsible for vital functions such as heart rate, breathing, digestion, and body temperature.
Explanation:The subdivision of the peripheral nervous system that consists of nerves that control all of the involuntary muscles, organs, and glands is called the autonomic nervous system. This system functions without our conscious awareness and is responsible for controlling vital functions such as heart rate, breathing, digestion, and body temperature. The autonomic nervous system can be further divided into two main branches: the sympathetic and parasympathetic nervous systems, which typically have opposing effects on the organs they innervate.
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Select the correct answer from the list.
When it is burned to produce electricity (petroleum, natural gas, coal) emits the most carbon dioxide. This fossil fuel accounted for ( 1/3, 1/2, 3/4 ) of the electricity generated in the United States and emitted 68 percent of the carbon dioxide produced by generating electricity.
Answer:
When it is burned to produce electricity, coal emits the most carbon dioxide. This fossil fuel accounted for 1/3 of the electricity generated in the United States and emitted 68 percent of the carbon dioxide produced by generating electricity.
Gases like carbon dioxide increase the temperature and cause global warming. Carbon dioxide makes the vast majority of greenhouse gas emissions from the electricity sector.
Coal is the fossil fuel that produced the maximum amount of carbon dioxide by burning to produce electricity. This fossil fuel accounted for 1/3 of the electricity generation.
Fossils fuelsIt is a fossil fuel formed by the decay of organic matter over prolonged periods under Pressure and in the absence of air. It then undergoes heat treatment (carbonization) to yield carbon dioxide, methane, water, and deposits of material rich in carbon.
Coal is used mainly as fuel to generate electric power for steam engines, factories, and electric plants. About 68% of this electricity generation was from fossil fuels—coal, natural gas, petroleum, and other gases.
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Fill in the blanks.1. The specific location within an enzyme molecule where the substrate binds is called the:_______ . 2. During an enzymatic reaction, a molecule of binds to the enzyme and is broken down into one or more molecules of , __________which are released. 3. A_____________ is a molecule that can bind to an enzyme and prevent the enzyme from working. 4. Lactose takes years to break down on its own. But if exposed to the protein lactase, the reaction proceeds very quickly, while lactase itself remains unchanged. Lactase is an example of a_____________ . 5. The___________ between an active site and its substrate often strains bonds and helps the reaction proceed.
Answer:1. enzymes active site, 2. substrate, 3. inhibitor, 4. an enzyme, 5. induced fit
Explanation: hope this helps
The terms required to fill in the blanks in the student's question are, in order, 'active site', 'substrate', 'products', 'inhibitor', 'catalyst', and 'interaction'. This is in regard to the biological process of catalysis by enzymes.
Explanation:1. The specific location within an enzyme molecule where the substrate binds is called the: active site. 2. During an enzymatic reaction, a molecule of substrate binds to the enzyme and is broken down into one or more molecules of products, which are released. 3. An inhibitor is a molecule that can bind to an enzyme and prevent the enzyme from working. 4. Lactose takes years to break down on its own. But if exposed to the protein lactase, the reaction proceeds very quickly, while lactase itself remains unchanged. Lactase is an example of a catalyst. 5. The interaction between an active site and its substrate often strains bonds and helps the reaction proceed.
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What are the characteristic of the domain bacteria?
Answer:
unicellular
Explanation:
1. What is the percent increase in carbon dioxide in the atmosphere between 2015 and 2019? Between 1960 and 2015?
Answer:
2. Explain the fluctuation in the carbon dioxide levels each year.
CAN SOMEONE HELP ME WITH THIS? IT WORTH HALF OF MY GRADE I WILL GIVE BRAINLIST ASAP
Answer:
1. Between 2015. and 2019. is 2.977667493796526% and between 1960. and 2015. its 27.129337539432175%
2. Carbon dioxide fluctuation is a direct response due to photosynthesis and respiration increase in spring and summer and decrease in fall and winter
Explanation:
The percentage of carbon dioxide in the atmosphere varies. An WMO report shows that from 2015-2019, there has been a continued increase in carbon dioxide (CO2) levels and CO2 growth rates nearly 20% higher than the the other previous five years.
Studies has also shown that due to the annual growth rate of atmospheric carbon dioxide, it rate has been tripled. That is from 0.6 ppm per year in the early 1960s to an average 2.1 ppm in the past 10 years.The amount of CO2 found in the atmosphere is known to varies every year. Studies has shown that this variation is because of the role of plants in the carbon cycle.
Plants are known to use CO2 from the atmosphere when using the sunlight and water so that they can produce food and other substances that they need to survive and thrive.
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Provide TWO reasons why the genotype and phenotype frequencies do not match in the Tadjik population. (Hint: Think about the methods used to obtain the data and the differences between what is represented by genotype and phenotype data.)
Answer:
The reason why the genotype and phenotype frequences do not match is just because the 1) The genotype based on genes observation,while the phenotype based on physical appearance of the organism externally
Explanation:
the genotype is looking on the arrangement of genes in pair and get its frequency ,while phenotype the external physical appearance of organism is observed to get frequency
Final answer:
The discrepancy between genotype and phenotype frequencies in the Tadjik population may be due to incomplete penetrance, where individuals do not exhibit the expected phenotype, and inaccuracies in phenotype measurement, reflecting challenges in capturing the full scope of observable traits.
Explanation:
Understanding why the genotype and phenotype frequencies do not match in the Tadjik population involves considering both biological principles and methodological issues. Firstly, it's important to recognize that genotypes refer to the genetic makeup of an organism, comprising alleles received from both parents. Phenotypes, however, are the observable characteristics or traits of an organism, influenced not only by genotypes but also by environmental factors.
One reason for the discrepancy between genotype and phenotype frequencies can be attributed to incomplete penetrance. This genetic phenomenon occurs when individuals with a certain genotype do not exhibit the expected phenotype due to interactions with environmental factors or other genes. This could significantly affect the observed phenotype frequencies in a population if the condition with incomplete penetrance is common within that group.
The second reason involves the accuracy of phenotype measurement. Phenotypic characteristics can sometimes be challenging to measure accurately due to variability in expression levels, environmental influences, or the subjective nature of certain traits. These issues can lead to discrepancies in the reported phenotype frequencies, especially if the data collected does not adequately capture the diversity or intensity of traits within the population.
Which are the following is a true statement about prions?
A. They are viruses
B. Are the cause of Ebola
C. They are composed of misshapen proteins
D. Usually infect plants
Answer: Option C) C. They are composed of misshapen proteins
Explanation:
Prions are infectious agents that contain protein but no nucleic acids (DNA or RNA). Prions have been implicated in the causative agent in several diseases such as:
- Mad cow's disease
- Creutzfeldt-Jakob disease etc
a cell will usually undergo apoptosis if the cell experiences dna damage that could lead to a tumor. Predict what may happen if a gene that controls apoptosis is damaged
Answer:
P⁵³ gene called as tumor suppressor gene is responsible for apoptosis.
Explanation:
The protein which encodes the gene belongs to a family of protein that have 3 members P⁵³,P⁶³ and P⁷³.
P⁵³ is known as tumor suppressor protein that is responsible for apoptosis of cells.
This protein is encoded by TP53 gene.This is important and play a crucial role in cell cycle an thus functions as tumor suppressor which involved in preventing cancer.Thus it is called called as "Guardian angel gene".
It not only function as anti cancer but also participate a crucial role in apoptosis,genomic stability and inhibition of angiogenesis.
It can also activate certain proteins that are which helps in DNA repair process.
Answer:
If damage is beyond repair the cell will normally send itself into apoptosis, ensuring that it will not pass on its damaged DNA.
Explanation:
As the snow melts from atop mountains in the spring, the river below begin to flood. What type of disturbance is this?
A. Primary
B. Secondary
C. Cyclical
D. Small
A springtime flood caused by melting snow from mountains is a cyclical disturbance in the ecosystem, which is a repeated, natural phenomenon and not one that typically incites ecological succession. Therefore, the correct answer is option C.
When snow melts from the mountaintops in the spring leading to the rivers below beginning to flood, this is classified as a cyclical disturbance. A cyclical disturbance is a repeatable, natural event that occurs with regularity in an ecosystem, like the seasonal patterns we observe with snow melt and flooding. Unlike primary succession, which occurs in an area devoid of vegetation and other organisms usually following a catastrophic event, or secondary succession, which takes place after an ecosystem has been disturbed but the soil remains intact, cyclical disturbances are part of a pattern and do not necessarily lead to succession.
Floods like this contribute to surface runoff, which is part of the hydrologic cycle. These waters can sometimes help to nourish the flood plains, but can also cause significant damage when the volume of water is too great. Understanding these events is critical for managing ecosystem populations and preparing for natural disasters to minimize their impact on human and natural systems.
Which is the pancreatic hormone associated with diabetes?
a. Glycogen
b. Glucagon
c. Insulin
d. Bile
e. Glucose
Answer:C
Explanation:
An increase in blood glucose levels will lead to: All of these choices are correct. a breakdown of glycogen in the liver. increased insulin production. a breakdown of glycogen in the muscles. increased glucagon production.
Answer: increase in blood level of glucose will lead to increased insulin production.
Explanation:
Blood glucose level is the concentration of glucose (simple sugar) in the blood of humans and other animals. The body functions by regulating blood sugar level tightly as a part of body haemostasis.
Excess glucose intake in blood result to glucogen production (glycogenesis). A process whereby glucose is stored as glycogen in liver cells and skeletal muscles.
Blood glucose level is regulated by two hormones as part of haemostasis which are:
-Catabolic hormones (glucagon, cortisol and catecholamines)
-Anabolic hormones (insulin)
Glucagon responds to low level of blood glucose. It is secreted from alpha pancreatic cells. Once blood glucose level is low, it tells the tissues to generate more glucose by breaking down glycogen stored in skeletal muscles and liver cells.
Insulin is produced from beta pancreatic cells to respond to high level of glucose (simple sugar) in the blood. It lowers the level of blood glucose by informing the skeletal muscles and liver cells to take and store excess glucose as glycogen. Epinephrine gets the body muscles ready for 'fight and flight' response while cortisols generate the body fuel during stress.
A marine scientist in California wants to study the habitat of Atlantic blue crab, a species of crab found around the Chesapeake Bay. How can he best study the habitat of these organisms
Explanation:
The best to study about the habitat of this organism is to collect and analyze water samples from Atlantic blue crab habitats within the Chesapeake Bay Because taking a sample of the water will about the different microorganisms in it and the temperature of water suitable for Atlantic blue crab. Appropriate conditions might not be met at the lab for Atlantic blue crab to conduct an experiment. Hence, the scientist can be "study the habitat of these organisms by the best study of these sample of water"The parent of a young client with severe hearing loss is quite concerned about the child’s future independence because of impaired hearing. Which type of hearing loss is usually irreversible?
Explanation:
Your ear is comprised of three sections—the external, the center, and the internal ear. Sensorineural hearing loss or SNHL, occurs after internal ear harm. Issues with the nerve pathways from your inward ear to your cerebrum can likewise cause SNHL. Delicate sounds might be difficult to hear. Significantly stronger sounds might be hazy or may sound stifled. This is the most widely recognized kind of permanent hearing loss. More often than not, medication or medical procedure can't fix SNHL. Listening devices may enable you to hear.
Corbin recently found out that he has cancer, and he now strictly follows a treatment, diet, and exercise program that the doctor thinks will be helpful in keeping the cancer from spreading. These behaviors best illustrate ____ coping.
Answer:
Corbin recently found out that he has cancer, and he now strictly follows a treatment, diet, and exercise program that the doctor thinks will be helpful in keeping the cancer from spreading. These behaviors best illustrate problem-focused coping.
Explanation:
Problem-focused coping seeks to tackle the stressor head-on allowing the individual greater perceived control over their problem resulting in :
Managing and changing the stressorUse if problem seems alterableConfrontice copingPlanful problem solvingAs Cobbin is strictly following treatment, diet and exercise programs that the doctor thinks will be helpful in keeping the cancer from spreading, Cobbin is showing problem-focused coping.
Colors such as brown or gray are created by mixing: a) primary and tertiary colors in equal proportions b) tertiary and secondary colors in equal proportions c) primary, pure and tertiary colors in unequal and equal proportions d) primary, secondary and tertiary colors in unequal and equal proportions
Colors such as brown or gray are created by mixing primary, secondary and tertiary colors in unequal and equal proportions.
What are primary colors?Primary colors are three major colors (i.e., blue, green, and red) means that can be used to produce the white color.
These colors (primary colors) can be used to create all range of colors in the visible spectrum.
In conclusion, colors such as brown or gray are created by mixing primary, secondary and tertiary colors in unequal and equal proportions.
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Imagine you are a red blood cell sitting in the right atria of the heart. Write a paragraph that describes what happens to this red blood cell as it moves through the body. What structures will it pass through
Answer:
Blood requires to be oxygenated and for that reason to avoid the mixing of the two forms or types of blood with different properties and characteristics. As, the blood inside the human body is either in the oxygenated form or it is in the deoxygenated form, while the whole characterizing of the blood medium is based upon the presence of the oxygen,O₂ and carbon dioxide,CO₂ inside it. While, the lungs are there for the oxygenation of the blood inside the human body, which is comprised of the small air sacs or alveolar bodies for the oxygenation of the blood supplied to it by the pulmonary artery from the right auricle. As, the blood supplied from all over the body is transported back to the heart through the superior and inferior venacava pouring the deoxygenated form of blood in to the heart. As the blood remains there for less then a second and goes into the right ventricle carrying it to the pair of lungs through the pulmonary artery.Inside the lungs the alveoli treats the material present inside the blood medium, which is processed through the process of respiration and oxygen is added to it while the carbon is removed and extracted from the body of the human being.As, the purified form of blood is sent back to the heart via the pulmonary artery, which pours the blood back into the left auricle.You find a multi-legged animal in your garden and want to determine if it is a centipede or a millipede. You take the animal to a university where a myriapodologist quickly tells you that you have found a centipede. Which of the following may have allowed her to make this distinction?A) segmentationB) poisonous fangsC) egg-layingD) molting
Answer:
B) poisonous fangs
Explanation:
Centipedes and millipedes are jointed legs animals. Centipedes are members of the class chilopoda and millipedes are members of the class diplopoda of the phylum Arthropoda.
Presence of poisonous fangs in the centipedes differentiate them from millipedes. Nutritionally centipedes are carnivorous, they kill prey or paralyze prey with large jaws. Unlike the centipede, millipedes are feed on dead and decaying organic matter such as leaves and compost.
Final answer:
The myriapodologist identified the multi-legged animal as a centipede likely due to its poisonous fangs (C) called forcipules and because it has one pair of legs per body segment.
Explanation:
The myriapodologist was able to quickly determine that the multi-legged animal you found in your garden is a centipede most likely due to the presence of poisonous fangs, known as forcipules. These forcipules are modified legs on the first segment of centipedes like Scutigera coleoptrata, capable of delivering venom to their prey, which is a distinctive feature of centipedes. Another key difference between centipedes and millipedes that could have aided in identification is that centipedes have one pair of legs per body segment and tend to be somewhat dorsoventrally flattened, while millipedes have two pairs of legs per body segment due to the embryonic fusion of adjacent segments and are usually rounder in cross-section.
Put the events of a reflex arc in order from the first event through the last event. 1. CNS sends output via motor neurons to an effector. 2. Sensory neurons bring the stimulus to the CNS. 3. The muscle contracts. 4. CNS processes and integrates the information. 5. Sensory receptor detects the stimulus
Answer:
1. Sensory receptor detects the stimulus
2. Sensory neurons bring the stimulus to the CNS
3. CNS processes and integrates the information
4. CNS sends output via motor neurons to an effector
5.The muscle contracts
Explanation:
Reflex arc is the neuronal pathway by which a reflex is produced from a stimulus. The sensory receptors detect the stimulus and send the signal to brain through sensory neurons. The central nervous system integrate the information and send response through motor neuron which produce the physiological effect.
Example; The thermal receptors detect high temperature and send signal to CNS through sensory neurons. The CNS integrate the information and send signal to corresponding muscles such as blood vessels to dilate and sweat gland to activate through motor neurons.
The reflex arc begins with the detection of the stimulus by sensory receptors, which relay this information to the CNS via sensory neurons. The CNS processes and integrates the information (option 4)and then sends the instruction for response via motor neurons to the muscles which in turn contract eliciting the reflex action.
Explanation:A reflex arc is a neural pathway that controls an action reflex. The events of a reflex arc take place in a particular order to ensure a quick and appropriate response to a particular stimulus. Let's go through these events in sequential order:
Sensory receptor detects the stimulus: The reflex arc begins when the sensory receptor detects a harmful stimulus.Sensory neurons bring the stimulus to the CNS: The sensory neurons carry the information about the stimulus to the Central Nervous System (CNS).CNS processes and integrates the information: The CNS processes the information received and prepares the body for appropriate response.CNS sends output via motor neurons to an effector: The CNS sends motor impulses via motor nerves to the muscles.The muscle contracts: On receiving the signals from motor neurons, the muscles (effectors) contract which triggers the reflex action.so the correct option is 4.Learn more about Reflex Arc here:https://brainly.com/question/32286035
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Lysine is an essential amino acid for animals. If an animal did not consume lysine in its diet, what could happen to it?
If an animal did not consume lysine in its diet, then it would not be able to synthesize many necessary proteins.
Explanation:
Lysine is an essential amino acid which helps the tissues to grow.
Lysine is a limiting amino acid which acts as a substrate to generate animal body proteins, and the peptide and non-peptide molecules.
In animals like chicken, swine etc grown for their meat, lysine is supplemented in animal feeds to increase their muscle tissue growth and increased meat production.
Further dietary lysine deficiency in animals will lead to reduction in muscle mass, impairment of immunity and body defense against infections, affects synthesis of many animal proteins like milk proteins in bovine animals.
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Cortisol is a useful adrenal hormone because it _____.
a. always is part of a negative feedback loop
b. ensures that adequate glucose is available to the brain when needed
c. causes all cells to take up glucose
d. reduces the size of the hippocampus
e. cannot be subject to overproduction
Successful entrepreneurship requires both ________ and ________ reasoning. (1pts) Student Results Multiple Choice Multiple Choice Options Unselected divergent; convergent Unselected divergent; lateral Incorrect Selected convergent; lateral Incorrect Unselected asymmetric; symmetric
Answer:
divergent; convergent
Explanation:
Convergent reasoning involves analyzing and evaluating different ideas in order to select the best solution to a problem, while divergent reasoning involves generating several creative ideas and solutions to a problem.
Both reasoning is important for a successful entrepreneurship as convergent reasoning would help in streamlining past options or solutions to pick the best that have once worked, thereby saving time and resources of trying too many options. On the other hand, divergent reasoning is needed for creatively finding new solutions, which might be another “turning point” for a business.
Successful entrepreneurship requires a balance of divergent and convergent reasoning, which are connected to creativity and practical decision-making, respectively.
Explanation:Successful entrepreneurship requires both divergent and convergent reasoning. Divergent thinking is the ability to think 'outside the box' and generate multiple, unique solutions to problems. Convergent thinking, on the other hand, involves focusing on finding the most effective answer or solution that is already well established. While divergent thinking is associated with creativity and innovation, which are crucial for identifying new business opportunities and strategies, convergent thinking is necessary for making decisions that lead to efficient and practical implementation of those ideas in business operations. Entrepreneurs need to balance both types of thinking to tackle the broad array of challenges they encounter, from the conceptualization of a product or service to the actual delivery to the market and day-to-day business management.
Joanne is a 60-year-old patient with an LDL of 132 and a family history of coronary artery disease. She has already tried diet changes (increased fiber and plant sterols) to lower her LDL and after 6 months her LDL is slightly higher. The next step in her treatment would be:
A. A statin
B. Niacin
C. Sterols
D. A fibric acid derivative
Answer:
The correct answer is option A. "A statin".
Explanation:
Statins a type of drug that are prescribed to treat people that are at high risk of developing a cardiovascular disease. Since Joanne is a person with history of coronary artery disease and her LDL levels remained high after trying diet changes, the next step in her treatment will be to take a statin drug. It has been proved that statin are among the most effective drug at lowering LDL levels, therefore, a treatment with a statin will be effective for Joanne's condition.
The niche of a species is the functional role of that species in the community that it belongs to. Species that have narrow niches (have very specific resource requirements) are said to be ________, while species that have broad niches (able to use a wide array of resources) are known as
Explanation:
Niche is the role played by an organism that how it lives in an environment
Specialists
Species that have narrow niches are called specialists and this type of niche is called realized nicheIt is narrow because of the presence of ecological barriers and is the space where a species actually livesGeneralists
Species that have broad niche are called generalists and this type of niche is called fundamental nicheIt is larger than the realized niche due to absence of ecological barriers It represents all the environmental conditions where a species is able to live or can liveCells are infected with a vesicular stomatitis virus (VSV) strain in which a viral gene (VSVG) is fused to the green fluorescent protein gene. When the chimeric protein is synthesized, what pathway does it follow from synthesis until it leaves the cell?
Options:
RER, Golgi complex, plasma membrane, viral envelopes RER, Golgi complex, viral envelopes, plasma membrane Golgi complex, RER, plasma membrane, viral envelopes.RER, Golgi complex, mitochondria, plasma membrane, viral envelopes RER, mitochondria, Golgi complex, plasma membrane, viral envelopesAnswer:
Option-(5): RER, mitochondria, Golgi complex, plasma membrane, viral envelopesExplanation:
The cellular organelles are well arranged in a given systematic order to execute the process for the synthesis of the chimeric protein inside the living being body.
When red and white snapdragon flowers are crossed, the offspring are pink. If these pink flowers are crossed with white ones, what percent of the seeds produced are likely to develop into pink flowers?
Answer:
50%
Explanation:
This is a case of incoplete dominance of the red allele over the white allele.
Let the red allele be R and the white allele be r.
RR x rr = All Rr, pink flower phenotype.
The pink flower plants are then crossed with white flower plants;
Rr x rr = Rr (pink), Rr (pink), rr (white) and rr (white).
50% or 1/2 of the offspring will be pink flowered while the remaining 50% or 1/2 will be white flowered.
What is the relationship between choanoflagellates and animals?
Answer: It's the cells, just without the chloralplast , but animals don't need that because only plant cells have chloralplast. So animals only get theses type of cells if they a herbivores,or omnivores because they eat plants and it helps them survive that way
Explanation:
Choanoflagellates are unicellular organisms considered to be the closest living relatives of animals, sharing key morphological and genetic features with metazoans, especially sponges. Their similarities in the structure of feeding cells and expression of certain genes highlight the evolutionary relationship, suggesting that these protists may parallel the earliest animal forms.
The relationship between choanoflagellates and animals, particularly metazoans (multicellular animals), is a significant area of interest in evolutionary biology. Choanoflagellates are a group within the Opisthokonta and are considered the closest living relatives of animals. These protists are mostly unicellular, but some can form colonies, and they number about 244 described species.
Choanoflagellates share some key characteristics with sponges, suggesting a close evolutionary relationship. Both choanoflagellates and sponge collar cells possess a single apical flagellum surrounded by a contractile collar of microvilli, which functions to filter food particles from the water. This similarity points to a possible common ancestor and indicates that choanoflagellates may resemble the earliest forms of animal life.
In addition, choanoflagellates express genes for several proteins essential for cell-cell interactions in metazoans, thereby highlighting the genetic and functional ties between these protists and multicellular animals. Their morphology and genetic attributes provide crucial insights into the evolution of animals from single-celled ancestors.
Thus, studying choanoflagellates can help us better understand the origins of complex multicellularity and the evolutionary trajectory that led to the vast diversity of animals observed today.
The African finch Pyrenestes is an example of A. guided selection. B. stabilizing selection. C. uniform selection. D. directional selection. E. diversifying selection.
Answer:
E. diversifying selection.Explanation:
Natural selection is a mechanism that plays an important role in the process of evolution. On the basis of factors and mechanisms, it is classified into many classes such as diversifying selection, directional selection and some other.
Diversifying selection is such kind of natural selection that favored extreme values of the trait on intermediate values. It is also called as disruptive selection.
The African finch Pyrenestes exemplifies diversifying selection, which favors multiple distinct phenotypes within a population, leading to a wide range of advantageous traits such as variations in beak size.
The African finch Pyrenestes is an example of E. diversifying selection. Diversifying selection, also known as disruptive selection, occurs when natural selection favors two or more distinct phenotypes within a population, often leading to greater genetic variance. In the context of Pyrenestes finches, this form of selection has resulted in significant variation in beak size among individuals within the same species, primarily due to the different types of seeds available as food sources in their environment. Some finches have evolved larger beaks suitable for cracking hard seeds, while others have smaller beaks ideal for softer seeds, illustrating how diversifying selection encourages a range of advantageous traits.