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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 24, Problem 9SQ
Textbook Problem
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A __________ can reassemble if broken into individual cells.

  1. a. sea anemone
  2. b. roundworm
  3. c. sea star
  4. d. sponge

Summary Introduction

Concept introduction: Sponges belong to the Phylum: Porifera that are entirely aquatic animals, which lack tissue and organ systems. They are primitive multicellular eukaryotic animals.

Explanation of Solution

Reasons for correct statement:

Sponges have the ability to regenerate owing to the lack of any proper tissues or organ systems. If sponges are broken down into individual cells, the cells show amoeboid movement and reaggregate to form the original structure. If cells of more than one species are mixed, they have the ability to separate from the other and reaggregate to form their own kind.

Option d. is given as “sponges

As sponges have the ability to reaggregate even if they are broken down to individual cells, option d. is correct.

Reasons for the incorrect statements:

Option a. is given as “sea anemone”.

Sea anemone belongs to cnidarians. They have the ability to regenerate but they cannot reaggregate as the sponge cells if they are broke down to individual cells...

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