Which of the following would exert some type of selection pressure on a population?Choose All That Applya tornado in the population's habitatO presence of another species with similar resource needsincreased population density due to habitat restrictionthe introduction of a new parasite into the populationthe mutation of a gene in an individual in the population

Evolution is a continuous process and we are still evolving. Evolution is nothing but adapting to…

Answered: Which of the following would exert some…

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter40: Population Ecology

Section: Chapter Questions

Problem 2CT

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Choose the best below ? The northern elephant seal went through a severe population declineas a result of hunting in the late 1800s. As a result of a hunting ban,the population has rebounded but is now homozygous for nearlyevery gene studied. a. mutationb. natural selectionc. founder effectd. bottlenecke. gene flowf. nonrandom mating
Which of these conditions should completely prevent the occurrence of natural selection in a population over time? Group of answer choices Variation between individuals is not heritable. The environment is changing at a relatively slow rate. The population lives in a habitat where there are no competing species present. The population size is large.
Two different species cannot occupy the same niche in the same geographic area. If they do they will compete with one another for the same food and other resources. Eventually, one species will out compete the other. This is an example of natural selection. A) True B) False
Which of these conditions should completely prevent the occurrence of natural selection in a population over time? Group of answer choices The population size is large All variation between individuals is due only to environmental factors The population lives in a habitat where there are no competing species present The environment is changing at a relatively slow rate
If a populations allele and genotype frequencies remain constant from generation to generation, (a) the population is undergoing evolutionary change (b) the population is said to be at genetic equilibrium (c) microevolution has taken place (d) directional selection is occurring, but only for a few generations (e) genetic drift is a significant evolutionary force
If gene flow between two populations stops, which of the following could occur given enough time? a. speciation b. the population each gain unique alleles c. the timing of reproduction changes ending their ability to interbreed d. frequencies of alleles shift in different ways e. these are all things that could occur if gene flow between two populations of one species ended, given enough time
How does gene flow affect coevolution? For example, there is a coevolutionary arms race between snakes and newts. Snakes try to eat newts but they end up dying due to the newts' proudction of a toxin (TTX). In response, snakes have adapted a greater resistance to the toxin allowing them to not die. What would the factor of gene flow do to a population like this??
A large conservation agency in Austria is interested in the status of the endangered newt species, Triturus austriacus, and wants you to estimate population sizes. Describe at least two methods based on genetic markers such as microsatellites which could be used to estimate effective population size (NE). Compare their relative advantages and disadvantages.
Which is required for a population to evolve?a. genetic diversity c. gene flowb. selection pressure d. none of the above
A group of 50 men and 50 women establish a colony ona remote island. After 50 generations of random mating,how frequent would a recessive trait be if it were at afrequency of 1/500 back on the mainland? The population remains the same size over the 50 generations, andthe trait has no effect on fitness.
Which of the following are causes or consequences of an extinction vortex? Question 71 options: A population is greatly affected by genetic drift All of the above A population experiences inbreeding A population bottleneck drastically reduces the size of the gene pool The average fitness of the population declin
You are out in Wyoming, catching and marking coyotes You catch 23 coyates and mark them. They are released back into the wild. Two weeks later, you catch 15 coyotes. 10 of them have the mark you put on them. What is your population estimate? What other things, besides population size, might a population ecologist want to learn about his choosen population? How could mark- recapture also tell us about gene flow between populations

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