Biology
Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 15, Problem 8RQ

In what sense are humans currently acting as agents of selection on other species? Name some traits that are favored by the environmental changes humans cause.

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1) Baby head size is an example of 2) Giraffe neck length is an example of 3) Rabbit Size is an example of selection. selection. selection.
Natural selection and artificial selection or selective breeding can both cause changes in animals and plants. The difference between the two is that natural selection happens naturally, but selective breeding only occurs when humans intervene. Changes in genetic traits have occurred over generations through both natural selection and selective breeding although the occur through different means. What characterizes only artificial selection? Choose all that apply. A) chickens that lay larger eggs are favored B) selection increases the chances of surviving C) selection make a species stronger and fit for survival D) selection favors the desired characters in the new organisms
What are two reasons why a selection limit is reached in which artificial selection no longer has an effect?

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