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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 21, Problem 12SQ
Textbook Problem
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Choanoflagellates are considered the sister group to, or closest living relatives of, ______.

  1. a. plants
  2. b. animals
  3. c. fungi
  4. d. dinoflagellates

Summary Introduction

Concept Introduction: Choanoflagellates are flagellated cell in which the flagellum is surrounded by a collar of threadlike projections. Mostly the choanoflagellates live as single cells but in some organisms they form colonies. These colonies are formed by mitosis, when the descendant cells do not separate after the division. The cells consist of adhesion proteins and they will help them to stick together.

Explanation of Solution

Reasons for correct statement:

Choanoflagellates are aquatic heterotrophic protists that are known as the closest protistan relatives of animals. They belong to the opisthokont group which includes the fungi, animals and protistan relatives of Opisthokonts and the sister group Amoebozoans. They have adhesion proteins which are similar to those in animals.

Option c. is given as “animals”. As choanoflagellates are considered as the closest living relatives of animals, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “plants”...

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