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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 9SQ
Textbook Problem
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Which group does not include human pathogens?

  1. a. Apicomplexans
  2. b. Ciliates
  3. c. Euglenids
  4. d. Parabasalids

Summary Introduction

Concept Introduction: Euglenids are free living protists with mitochondria. Euglenids are mostly fresh water organisms and only a few survive in marine conditions. Most of the Euglenids have the ability to perform photosynthesis. Some Euglenids like euglena are mixotrophs, which means that they function as heterotrophy when the situation prevents photosynthesis.

Explanation of Solution

Reasons for correct statement:

Euglenids are flagellated protists which have chloroplast inside the cell. They have the ability to perform photosynthesis and they are not pathogenic to humans.

Option c. is given as “Euglenids”.

As Euglenids are not included in the human pathogens, hence, option c. is correct.

Reasons for the incorrect statements:

Option a. is given as “Apicomplexans”.

Apicomplexans are parasites that cause the diseases like malaria and toxoplasmosis. So, option a...

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