Concepts of Biology
Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Chapter 11, Problem 20CTQ

Two species of fish had recently undergone sympatric speciation. The males of each species had a different coloring through which females could identify and choose a partner from her own species. After some time, pollution made the lake so cloudy it was hard for females to distinguish colors. What might take place in this situation?

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Two species of fish had recently undergone sympatric speciation. The males of each species had a different coloring through which females could identify and choose a partner from their own species. After some time, pollution made the lake so cloudy it was hard for females to distinguish colors. What reproductive barrier might occur? Explain your answer.
If two groups of mice live on opposite sides of a river, they are two separate species. What two processes must have occurred in order for them to have become separate species?
A population of lizards colonizes a region and feeds on small arthropod species. Over time, a small group within the population starts eating different types of worms. Over time, this group develops inherited traits that help them catch, eat, and digest the worms. The two lizard groups share the same habitat but no longer recognize each other’s mating calls. What does this scenario best describe?     A. speciation without geographic isolation   B. natural selection without speciation   C. increased genetic variation without speciation   D. decreased genetic variation with geographic isolation
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