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Flashcards in Chapter 6 Deck (14)
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1

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

Diffusion

2

True/False

Sponges are bilaterally symmetrical as juveniles but radially symmetrical as adults

False

3

True/False

Choanocyte cells play a role in many sponge species.

True

4

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

Archaeocytes

5

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

Hexactinellida

6

True/False

The asconoid sponges have the simplest type of canal system

True

7

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

Choanocytes

8

The water outlets in sponges are known as __________

Oscula

9

The adaptive radiation of sponges is mainly due to:

A unique water current system

10

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

Pinacocyte

11

True/False

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

False

12

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

Spicules

13

The demosponges

Include the freshwater sponges

14

The structural protein found in sponges is

Spongin