EBK BIOLOGY
5th Edition
ISBN: 8220100667978
Author: Maier
Publisher: PEARSON
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Chapter 12, Problem 10LTB
Summary Introduction
Introduction:
When the environment creates an outside barrier to reproduction, such as a mountain range or river, it is known as reproductive isolation. Genetic drift (allelic drift) can be defined as the variation in the frequency of an existing allele in a population due to an accidental sampling of organisms.
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Another way to say "Natural Selection" is:
differential success in reproduction
mutation
selective breeding
differential access to mating partners
variation
O preferential sex choices
A population has several generations of random mate choice followed by a generation of nonrandom mate choice. The effect of this generation of nonrandom mate choice is ____.
a new evolutionary pattern due to nonrandom mate choice would begin
equilibrium (no change between the random generations and the nonrandom generation)
a reversal of the evolutionary pattern set by random generations due to a generation of nonrandom mate choice
A change in structure, behavior, or physiology that enhances survival, and reproductive success in a particular environment is called _________.
Genetic drift
Mimcry
Adaptation
Gene flow
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- Which of the following set of characteristics would best described a K-selected species (e.g. an elephant)? early reproduction with many, small offspring and short-lived early reproduction with few, large offspring and short-lived late reproduction with few, large offspring and long-lived O late reproduction with many, small offspring and long-livedarrow_forwardIn birds, where the female typically handpicks the male to reproduce with, there are clear differences in appearance between the genders. That difference in appearance is called Gender Binarism Runaway Selection Sexual Dimorphism Divergent Evolutionarrow_forwardDrag the labels from the left to their correct locations in the concept map on the right. evolution genetic variation Hardy-Weinberg equilibrium genetic drift adaptations sexual reproduction allele frequencies include individuals with differences due to sources are mutation Populations are units that undergo natural selection results in if change in may be in the if no change in can be altered by environment maintained only if gene flow Reset large population size, no. gene flow, no mutation, random mating, no natural selectionarrow_forward
- A population of a species evolving toward a favored extreme trait is _____. disruptive selection directional selection stabilizing selection artificial selectionarrow_forwardTRUE OR FALSE? The interdependent evolution of similar organisms whose members freely interbreed in the wild is called coevolutionarrow_forwardWord Bank 2: gradual nonrandom natural selection adapted frequent frequency generations natural selection survive reproduce reproduce natural selection Natural Natural selection is the gradual, Selection process by which biological traits become either more or less in a population based on how much the organisms carrying them are able to It is a key part of how OCcurs.arrow_forward
- Which the following statements about Darwin's theory of natural selection is true? O In order to reproduce more successfully, an individual must evolve so that it adapts to its environment. The natural environment consistently causes variation of certain traits in the population. O Individuals with inherited traits that are better suited to the local environment are more likely to survive and reproduce than less well-suited individuals. Natural selection, by its cumulative effects over long periods of time, could have caused random changes in ancestral species, thus giving rise to two or more descendant species.arrow_forwardWhich of the below is NOT a component of natural selection? Group of answer choices Differential reproduction generated by human breeding. Variation is heritable. Variation among individuals. Differential reproduction among phenotypes.arrow_forwardNatural and sexual selection both lead to evolution, but these processes can work against each other. Differentiate between these two forms of selection and give an example of a situation where natural selection reduces mate choice and sexual selection reduces survival.arrow_forward
- What force, which changes gene frequencies, occurs if there is a failure to reproduce or if individuals become isolated from the rest of their population? mutation radiation genetic drift nonrandom matingarrow_forwardNatural selection acts on individual but only population evolve true or falsearrow_forwardIn sexual reproduction, gametes that are large have the advantage of providing a good amount of resources for the developing offspring. Gametes that are small have the advantage of mobility. We call large gametes eggs and small gametes sperm. Medium-sized gametes neither have enough resources for the developing offspring nor they have the capacity of mobility and hence, are eliminated by natural selection. Which type of natural selection is this an example of? -stabilizing selection -sexual selection -directional selection -disruptive selectionarrow_forward
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