Mollusks and Echinoderms

Question 1

Which structure forms the outer wall of a mollusk’s body and protects its internal organs?

Revolt · Accepted Answer

mantle

Question 2

What is the function of the structure labeled A?

Revolt · Accepted Answer

It delivers oxygen to the blood.

Question 3

Which organisms are a part of the largest group of mollusks? Check all that apply.

Revolt · Accepted Answer

snails; slugs

Question 4

Which characteristic is unique to cephalopods?

Revolt · Accepted Answer

They have a closed circulatory system.

Question 5

Choose the word that best completes each sentence. Echinoderms are a group of aquatic invertebrates, but they are only found in water. The of an echinoderm is made of hardened plates, which make the animal feel bumpy. The body of an echinoderm is arranged like the spokes on a wheel. This is called symmetry.

Revolt · Accepted Answer

Part 1: salt; Part 2: endoskeleton; Part 3: radial

Question 6

In which type of echinoderm are tube feet not used for movement?

Revolt · Accepted Answer

brittle star

Question 7

What characteristic do sea stars and brittle stars have in common?

Revolt · Accepted Answer

Both use tube feet to catch prey.

Mollusks and Echinoderms Answers

More from this Course

TRY EDGENUITY HACKS