Question 1

Phyla of sponge that are sac of cells with many pores

Accepted Answer

porifera

Question 2

A circulatory system in which fluid is not contained entirely within vessels

Accepted Answer

open circulatory system

Question 3

A circulatory system in which blood circulates through vessels that form a closed loop

Accepted Answer

closed circulatory system

Question 4

Stinging tentacles of a Cnidarian

Accepted Answer

nematocysts

Question 5

Phyla of animals that have a central body cavity, one central opening, and tentacles that sting

Accepted Answer

Cnidarian

Question 6

The ability of an organism to regrow lost body parts

Accepted Answer

regeneration

Question 7

A hard, external, supporting structure

Accepted Answer

exoskeleton

Question 8

An internal skeleton made of bone or cartilage

Accepted Answer

endoskeleton

Question 9

An invertebrate with a soft body covered by a hard shell

Accepted Answer

mollusk

Question 10

A mass of nerve cells

Accepted Answer

ganglion

Question 11

An identical, or nearly identical, repeating body part

Accepted Answer

segment

Question 12

A rapid change in the life cycle of animals from an immature to an adult

Accepted Answer

metamorphosis

Related quizzes