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Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332

Solutions

Chapter
Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 21, Problem 4SQ
Textbook Problem
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Some ______ enter and replicate inside human cells.

  1. a. apicomplexans
  2. b. water molds
  3. c. trypanosomes
  4. d. ciliates

Summary Introduction

Concept Introduction: Apicomplexans are the largest lineage in the parasitic protists which includes more than 5000 species. They are single- celled protists which spend most part of their life cycle inside cells of their animal host. The life cycle of apicomplexans is complicated as it includes both sexual reproduction and asexual reproduction.

Explanation of Solution

Reasons for the correct statement:

Apicomplexans are single-celled parasites that cause malaria in humans and during a part of their life cycle, they replicate inside the host human cells. The complex of microtubules and secretory vesicles at the upper tip of the cell is present in the parasite which helps them to invade the host cell.

Option a. is given “apicomplexans”. The apicomplexans replicate inside the host cells, therefore option a. is correct.

Reasons for the incorrect statements:

Option b. is given as “water molds”.

The reproduction of water molds is commonly by zoospores, which are motile asexual spores...

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