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Flashcards in Chapter 6 Deck (14)
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1
Q

In sponges, respiration and excretion of various molecules is accomplished by

A

Diffusion

2
Q

True/False

Sponges are bilaterally symmetrical as juveniles but radially symmetrical as adults

A

False

3
Q

True/False

Choanocyte cells play a role in many sponge species.

A

True

4
Q

Cells that can differentiate into any other type of cell in sponges are the _________

A

Archaeocytes

5
Q

Members of the class _______ are named glass sponges, found in deep sea areas.

A

Hexactinellida

6
Q

True/False

The asconoid sponges have the simplest type of canal system

A

True

7
Q

The cells of a sponge that are responsible for water flow and capture of some particles are the

A

Choanocytes

8
Q

The water outlets in sponges are known as __________

A

Oscula

9
Q

The adaptive radiation of sponges is mainly due to:

A

A unique water current system

10
Q

Thin, epithelial-type cells covering the outer surface of sponges are the _______

A

Pinacocyte

11
Q

True/False

Lophocytes are ameboid cells that can differentiate into all other cell types

A

False

12
Q

The minute needle-like structures that act as a skeletal support system in sponges are called

A

Spicules

13
Q

The demosponges

A

Include the freshwater sponges

14
Q

The structural protein found in sponges is

A

Spongin