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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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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 17, Problem 13SQ
Textbook Problem
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The difference between sympatric and parapatric speciation is ___ .

  1. a. parapatric speciation occurs only in velvet walking worms
  2. b. sympatric speciation requires a barrier to gene flow
  3. c. the extent of overlap in range
  4. d. reproductive isolation does not occur

Summary Introduction

Introduction: The evolutionary process where new species are evolved from the old or existing species is called as speciation. Generally, there are four types of speciation that include allopatric, sympatric, parapatric, and quantum speciation. Sympatric speciation is a type of speciation that involves the reproductive isolation between species of a population that shares the same habitat. Parapatric speciation is the type of speciation when the species are separated due to an extreme change in their habitat when they enter a new habitat.

Explanation of Solution

Reason for correct answer: The main difference between the sympatric and parapatric speciation is the extent of overlap in range because sympatric specification involves the evolution of species inside a population without geographical segregation, but the parapatric occurs only at the border of parent species range.

Option c. is given as “extent of overlap in range”.

The difference between the sympatric and parasympatric specification is the extent of overlap in range.

Hence, the correct answer is option c.

Reasons for incorrect answer:

Option a. is given as “parapatric specification occurs only in velvet-walking worms.”

This statement is incorrect. It cannot be said that parapatric speciation occurs only in the velvet-walking worm. It occurs in annual plants, snails, and flightless grasshoppers...

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