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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

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Chapter
Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 16, Problem 6SQ
Textbook Problem
151 views

A trait is adaptive if it ______.

  1. a. arises by mutation
  2. b. increases fitness
  3. c. is passed to offspring
  4. d. occurs in fossils

Summary Introduction

Introduction: All species appear different from one another, and they carry traits from their ancestors but with modification due to evolution. Adaptation is a process by which the organisms that best suited or adapted to the environment will survive, reproduce, and can transmit to the next generations, while the others undergo extinction. An adaptive trait is also known as a heritable trait that helps to enhance the fitness of an individual. The fitness is a degree of adaptation to a particular environment, and it is calculated by the individual’s ability to transmit the genetic contributions to their offsprings.

Explanation of Solution

Reason for correct answer:

In a mixed population, the organisms possessing a shared trait will be better suited to their environment than others. In a natural population, the individuals differ in their fitness. The fitness is a degree of adaptation to a particular environment, and it is calculated by the individual’s ability to transmit the genetic contributions to their offsprings. An adaptive trait or adaptation is a form of heritable trait that helps to increase the fitness.

Option b. is given as “increases fitness”.

An adaptive trait is also known as a heritable trait that helps to enhance the fitness of an individual.

Hence, the correct answer is option b.

Reason for incorrect answer:

Option a. is given as “arises by mutation”...

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