Evolution
Evolution
4th Edition
ISBN: 9781605356051
Author: Douglas Futuyma, Mark Kirkpatrick
Publisher: SINAUER
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Chapter 3, Problem 6PDT
Summary Introduction

To explain: The way in which natural selection prepares organisms for future events.

Introduction: Natural selection has no insight; it prepares the organisms for future events. For example, deciduous trees at high latitude drop their leaves before winter arrives in the spring, and animals such as squirrels and jays store food as winter approaches.

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Which of the following best explains the connection between increased competition and the evolution of a species by natural selection? Individuals migrate to another area in order to avoid competition for limited resources in the current ecosystem. Individuals that have traits that allow them to outcompete others survive better and produce more offspring. Individuals must become stronger to compete for resources, and this increased strength is passed on to the next generation. Individuals that must compete for limited resources are more likely to have diseases that cause mutations.
The Nopoli rock-climbing goby uses mouthparts modified into a sucker to climb up waterfalls as tall as 330 feet. It also uses this sucker to scrape food off surfaces. Which of the following statements would be TRUE if we were to call the sucker an adaptation for climbing? The sucker evolved originally under selection for its feeding function and was later coopted for climbing. The sucker evolved originally under selection for its climbing function and was later coopted for feeding. The sucker evolved originally due to drift and was later coopted for feeding.
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