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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332

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BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
ISBN: 9781337408332
Textbook Problem
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Species richness is greatest in communities ________.

  1. a. near the equator
  2. b. in temperate regions
  3. c. near the poles
  4. d. that formed recently

Summary Introduction

Introduction: The branch of science which deals with the study of the geographic distribution of species is called biogeography. The total number of species present in a given area is called as species richness.

Explanation

Reason for the correct answer:

The total number of species present in a given area is called as species richness. A huge number of species are found in the tropics and slowly decline from the equator to poles. This is because of many reasons. Firstly, the tropical latitudes can capture more sunlight and rainfall and also they have a longer growing season. Secondly, the tropical communities were found over many generations. Therefore, there can be more chances for the speciation to take place. The third reason is that the species richness is self-reinforcing. Hence, the species richness is greatly present in the communities that are near the equator.

Option a. is given as “near the equator”.

The species richness diverges with latitudes. It is mostly seen at low latitudes which mean that they are mostly seen near the equator.

Hence the correct answer is option a.

Reason for the incorrect answer:

Option b...

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