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BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition
STARR
Publisher: CENGAGE L
ISBN: 9781305967359

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BuyFindarrow_forward

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition
STARR
Publisher: CENGAGE L
ISBN: 9781305967359
Chapter 40, Problem 7SA
Textbook Problem
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When predators target large guppies, guppies that reproduce when ______ are at a selective advantage.

a. youngest b. oldest

Summary Introduction

Introduction:

Guppies are the small fishes that are native residents to shallow freshwater streams in the mountains of Trinidad. The evolutionary biologists John Endler and David Reznick studied the population of guppies to determine the actual impact or effect of predation on life history traits.

Explanation of Solution

Reason for correct answer:

Option a. is given as “youngest”.

Many predators prefer prey of a specific size. The predators such as cichlids are large fish. Cichlids tend to pursue large guppies and ignore the small ones. In this condition, the guppies that reproduce while young and small increases in frequency in a population due to selective advantage.

Reason for incorrect answer:

Option b...

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