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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 21, Problem 6SQ
Textbook Problem
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Chloroplasts of green algae evolved from ______.

  1. a. cyanobacteria
  2. b. archaea
  3. c. red algae

Summary Introduction

Introduction: Most of the protists have a chloroplast. Primary endosymbiosis results in the evolution of the first chloroplast. Chloroplast has evolved from other protists by the secondary endosymbiosis. The initial chloroplasts have two membranes, and the chloroplasts that are evolved through the secondary endosymbiosis process consist of four membranes. Green algae have the chloroplast that contains both chlorophyll a and chlorophyll b.

Explanation of Solution

Reason for the correct statement:

By the process of primary endosymbiosis, cyanobacteria evolved into chloroplast in the red algae and blue algae. The chloroplast of green algae that evolved from cyanobacteria contains two membranes.

Option a. is given as “cyanobacteria”. As the green algae’s chloroplast has evolved from the cyanobacteria, option a. is correct.

Reasons for incorrect statements:

Option b. is given as “archaea”...

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