What is one important advantage of using environmental DNA (eDNA), instead of traditional field-based capture techniques, to study species distributions? 1)For a given population density and sampling effort, eDNA has a higher probability of detecting a species if it is present. 2)By looking at telomere length on the chromosomes found in an environmental 3)DNA sample, researchers can gather information about the age distribution of organisms in a population. 4)By looking at epigenetic marks on an environmental DNA sample, researchers can gather information about the health of the organisms in a population. 5)All of the above

What is one important advantage of using environmental DNA (eDNA), instead of traditional field-based capture techniques, to study species distributions? 1)For a given population density and sampling effort, eDNA has a higher probability of detecting a species if it is present. 2)By looking at telomere length on the chromosomes found in an environmental 3)DNA sample, researchers can gather information about the age distribution of organisms in a population. 4)By looking at epigenetic marks on an environmental DNA sample, researchers can gather information about the health of the organisms in a population. 5)All of the above

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter57: Biological Diversity And Conservation Biology

Section: Chapter Questions

Problem 11TYU: Why might captive-breeding programs that reintroduce species into natural environments fail?

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What is one important advantage of using environmental DNA (eDNA), instead of traditional field-based capture techniques, to study species distributions? 1.) For a given population density and sampling effort, eDNA has a higher probability of detecting a species if it is present. 2.) By looking at telomere length on the chromosomes found in an environmental DNA sample, researchers can gather information about the age distribution of organisms in a population. 3.) By looking at epigenetic marks on an environmental DNA sample, researchers can gather information about the health of the organisms in a population. 4.) All of the above
Fixity of Species refers to… Group of answer choices A-the theory that species exist at a fixed location along a physiological continuum B-the fact that species are defined by fixed adaptations to their direct environment C-the theory presented by Thomas Malthus that population densities of any given species are most affected by mortality and fertility rates D-the pre-darwinian notion that species, once created, can never change E-the late 19th century concept that because mendelian traits are fixed they are evidence that variation within and between species are designed by God specifically for those species
Black-tailed prairie dogs used to be found in Alberta, but due to their destructive nature on farmland, the intensive efforts by ranchers and farmers to eradicate these animals has reduced the species to being found only in Saskatchewan. A farmer in Saskatchewan samples a population of black-tailed prairie dogs living in his field. Based on several samples, he finds an average of 9 prairie dogs living in an area of 7.0 m2.If he knows that his field is 4,000 m2, what is the approximate size of the prairie dog population? Select one: a. 3 111 prairie dogs b. 444 prairie dogs c. 5 143 prairie dogs d. 571 prairie dogs
The introduction of the antibiotic methicillin was once successful in destroying Staphylococcus bacterial infections. More recently, strains of Staphylococcus bacteria have undergone mutations that cause the bacteria to be resistant to the action of methicillin, leading to increased incidence of the disease MRSA (methicillin-resistant Staphylococcus aureus). How would the proportion of bacteria carrying this mutation change in the population over time in populations treated with methicillin? A. The number of mutated bacteria would increase because the mutated bacteria would outcompete the non-mutated bacteria for resources. B. The number of mutated bacteria would decrease because the non-mutated bacteria would outcompete the mutated bacteria for resources. C. The number of mutated bacteria would decrease because the non-mutated bacteria would be selected for over time through natural selection. D. The number of mutated bacteria would increase because the mutated bacteria are…
There are many other applications in which DNA barcoding might be useful. For example, how might ecologists use DNA barcoding to find out what species are present in a rain forest, or what kinds of animals a predator eats?
Gene flow can have one effect in the context of a single population, and a different effect in the context of two populations that were recently isolated from one another. Describe with specificity the effect that gene flow has a) on a single population, as well as b) on two populations that were recently isolated from one another.
10,000 individuals are sampled from a population and are found to display one of three blood types: AA with 6800 individuals, AB with 2800 individuals and type BB with 400 individuals. a) What is the frequency of each genotype in the population? b) What is the frequency of the A allele? c) What is the frequency of the B allele? d) If the next generation contains 25,000 individuals, how many would have blood type BB, assuming the population is in Hardy-Weinberg Equilibrium?
It has been hypothesized that population size affects genome size. What is the proposed relationship? How can it be explained?
Through PCR, we have determined the PER3 genotypes for a class of students as follows: H4/H4 = 125 individuals; H4/H5 = 90 individuals and H5/H5=85 individuals. Using the allele frequencies experimentally derived, calculate the frequency of the H4/H5 genotype that would be expected if the class were a population in Hardy-Weinberg equilibrium. 1- 0.43 2- 0.24 3- 0.49 4- 0.30 5- 0.57 6- 0.14 7- 0.19
What role does geographic isolation play in the formation of a new species? Group of answer choices A.If two populations become isolated geographically, then the two populations cannot interbreed with one another. There will be gene flow between the two. This will allow the two isolated populations to evolve independently leading to new species. B. If two populations become isolated geographically, then the two populations can interbreed with one another. There will be no gene flow between the two. This will allow the two isolated populations to evolve independently leading to new species. C. None of the answers are correct D. If two populations become isolated geographically, then the two populations cannot interbreed with one another. There will be no gene flow between the two. This will allow the two isolated populations to evolve independently leading to new species.
Consider the graphic that is presented and depicts the end-point for the following scenario. At some point in the past, species A resided as a large population entirely within a rectangular geographical area. The population became divided into two isolated populations when, during a major earthquake, a mountain range arose and disrupted gene flow. Over time, the two new populations evolved independently from one another, yielding species B and C. The population comprising species C became divided into two isolated populations when another earthquake created an escarpment that disrupted gene flow. Over time, these two new populations evolved independently from one another, yielding species D and E.Imagine that you were to arrive to the region long after species D and E had evolved, completely oblivious to the scenario that is described above; survey the region for living species in this group; and conduct a cladistic analysis on those species. Assuming that the data that you were to…
In general, what is the effect of complete selection, migration and random genetic drift on the gene frequencies of the population? b. migration