In a population of snails, snails with thicker shells are less likely to be preyed on by crabs than snails with thinner shells. Over time, you observe that the mean shell thickness of the population increases over successive snail generations. This is an example of None of the other answers is correct Stabilizing selection Directional selection Disruptive selection

In a population of snails, snails with thicker shells are less likely to be preyed on by crabs than snails with thinner shells. Over time, you observe that the mean shell thickness of the population increases over successive snail generations. This is an example of None of the other answers is correct Stabilizing selection Directional selection Disruptive selection

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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dentify the type of selection represented by this diagram Question 18 options: habitat isolation disruptive selection sexual selection directional selection stabilizing selection
Hutchinson-Gilford syndrome, is an extremely rare, progressive genetic disorder that causes children to age rapidly. Under which category does it best fit? Antagonistic pleiotropy Positive selection Selection shadow All of the above None of the above
Genetic drift differs from gene flow in that Group of answer choices genetic drift occurs at a steady, but low, rate in all populations while gene flow is largely random event occurring in small populations. genetic drift is most likely to produce a loss of genetic diversity in a population whereas gene flow will often increase genetic diversity in a population. none of these choices adequately describe the difference between genetic drift and gene flow. genetic drift is based on female choice of particular mates but gene flow is largely a product of natural selection.
Huntington’s Disease A population of people has a gene that determines whether they will developHuntington’s disease. The gene has two alleles, ”N” for normal allele and ”h” for the Huntington’s allele.According to the Hardy-Weinberg equilibrium, the frequency of the ”h” allele in the population is 0.005. Part AWhat is the frequency of the ”N” allele in the population?Part BWhat is the expected proportion of people in the population who are carriers of the Huntington’s disease?Part CWhat is the expected proportion of people in the population who are non-carriers of the Huntington’s disease?Part DWhat is the expected proportion of people in the population who will develop Huntington’s disease?
An evolutionarily stable strategy (ESS) is a Group of answer choices strategy that, if adopted by all members of the population, cannot be invaded by a mutant strategy. strategy that, if adopted by part of a population, cannot be invaded by a mutant strategy. mutant strategy that cannot invade a population. strategy that, if adopted by all members of the population, can be invaded by a mutant strategy.
Voles of two different colors, brown and gray, live on the same island. Hawks find these voles to be their primary food source. The voles are distributed through grassy areas in the north of the island and across lava flows in the south part. Which of the following is predicted by natural selection? Hawks find the voles by movement so it won't matter. A vole population that starts as a random mixture will never adapt to the environment. Brown voles are good at hiding in the grass; gray voles are excellent at climbing over lava flows. Consequently, the vole distribution will reflect the ability of hawks to identify each of them in its natural environment. If they stay as a mixed population, they will remain mixed because the two varieties will not interbreed with each other. The hawk population will be skewed toward the north side of the island
Which of the following is an effect of gene flow? Population size is greatly reduced Individuals establish a new population Natural disasters Genetic differences between populations are reduced
Decide which examples are most likely to increase variation or decrease variation. Some examples could do both. Which of the following could possibly increase genetic variation indirectly? toxins predator-prey relationships competition new habitat disasters increased food supply
In a population of frogs, individuals with green coloration are camouflaged on leaves and are less likely to be eaten by predators. However, as the number of green frogs increases, predators learn to search for them more effectively, making it advantageous to be a less common color. What type of selection is occurring in this scenario? Disruptive selection 8888 Positive frequency-dependent selection Stabilizing selection Negative frequency-dependent selection Directional selection
Why would you not want to harvest to a point where salmon populations are kept at very low numbers? Select true or false for each answer. small populations [ Choose ] are more likely to go extinct do to unforeseen (stochastic) events small populations [ Choose ] are more likely to lose genetic diversity small populations Choose ] are more susceptible to inbreeding depression small populations [ Choose ] are not growing very quickly so you would have low fishing yields
Which of the following statements is FALSE? not all individuals in a population reproduce'equally the frequency of a characteristic in a population can change between generations differential reproductive success alters a population from one generation to the next microorganisms can evolve much more quickly than most other organisms generation times are similar between species Oall of these statements are RUE
In a population of flowers, there is variation in petal size, with some flowers having very small petals and others having very large petals. Pollinators in the area are attracted to flowers with medium-sized petals, as they provide the most accessible nectar. Which type of selection is most likely occurring in this population of flowers? Group of answer choices Stabilizing Medial Directional Artificial Disruptive