Unit 4: Echinoderms

Adult Echinoderms have pentraradial symmetry

True or False

True

If you cut a sea star in half through the middle, only one of the piece will regrow into a whole star

True or False

False

Which of the following classes contain animals that evert their stomachs to digest food outside of their body allowing them to eat food much bigger than themselves?

a. Echinoidea

b. Ophiuroidea

c. Holothuroidea

d. Crinoidea

e. Asteroidea

Asteroidea

The largest class of Echinoderms

a. Ophiuroidea

b. Crinoidea

c. Holothuroidea

d. Echinoidea

e. Asteroidea

Asteroidea

Class name means "lily-like"

a. Holothuroidea

b. Crinoidea

c. Ophiuroidea

d. Echinoidea

e. Asteroidea

Crinoidea

Class name means "snake-like"

a. Echinoidea

b. Holothuroidea

c. Asteroidea

d. Crinoidea

e. Ophiuroidea

Ophiuroidea

Class name means "hedgehog-like"

a. Echinoidea

b. Asteroidea

c. Crinoidea

d. Holothuroidea

e. Ophiuroidea

Echinoidea

Animals in this class eviscerate when threatened

a. Asteroidea

b. Ophiuroidea

c. Echinoidea

d. Holothuroidea

e. Crinoidea

Holothuroidea

In sea stars, water enters through the madreporite(sieve plate)

True or False

True

Sea stars can regenerate missing parts, sometimes even whole arms

True or False

True

Class that contains feather stars

a. Holothuroidea

b. Echinoidea

c. Asteroidea

d. Ophiuroidea

e. Crinoidea

Crinoidea

Contains brittle stars

a. Ophiuroidea

b. Crinoidea

c. Holothuroidea

d. Asteroidea

e. Echinoidea

Ophiuroidea

Larval Echinoderms have radial symmetry

True or False

False

Contain sand dollars

a. Crinoidea

b. Asteroidea

c. Ophiuroidea

d. Echinoidea

e. Holothuroidea

Echinoidea

Contains sea urchins

a. Holothuroidea

b. Crinoidea

c. Asteroidea

d. Echinoidea

e. Ophiuroidea

Echinoidea

All Echinoderms have tube feet

True or False

True

Eats clams, oysters, worms, and other slow animals

a. Echinoidea

b. Crinoidea

c. Ophiuroidea

d. Asteroidea

e. Holothuroidea

Asteroidea

The surface where the mouth of the sea star is located is called the dorsal surface

True or False

False

Has no endoskeleton

a. Ophiuroidea

b. Asteroidea

c. Holothuroidea

d. Crinoidea

e. Echinoidea

Holothuroidea

Class name means "water polyp-like"

a. Holothuroidea

b. Crinoidea

c. Ophiuroidea

d. Echinoidea

e. Asteroidea

Holothuroidea

Class name means "star-like"

a. Asteroidea

b. Echinoidea

c. Crinoidea

d. Holothuroidea

e. Ophiuroidea

Asteroidea

A brittle star is most closely related to which of the following Echinoderms?

a. feather star

b. sea star

c. sea biscuit

d. basket star

basket star

The place where water enter the sea star is on the oral surface

True or False

False

Body is on a long stalk that is attached to rocks

a. Asteroidea

b. Crinoidea

c. Holothuroidea

d. Echinoidea

e. Ophiuroidea

Crinoidea

Contains sea cucumbers

a. Ophiuroidea

b. Echinoidea

c. Crinoidea

d. Asteroidea

e. Holothuroidea

Holothuroidea

Most closely resemble the oldest Echinoderm fossils of the Cambrian period

a. Echinoidea

b. Asteroidea

c. Asteroidea

d. Crinoidea

e. Ophiuroidea

Crinoidea

There are no Echinoderms that humans eat

True or False

False

Sea lilies are most closely related to which of the following Echinoderms?

a. sea star

b. feather star

c. basket star

d. brittle star

feather star

Contains basket stars

a. Asteroidea

b. Holothuroidea

c. Ophiuroidea

d. Crinoidea

e. Echinoidea

Ophiuroidea

A sand dollar is most closely related to which of the following Echinoderms?

a. sea cucumber

b. brittle star

c. sea urchin

d. sea star

sea urchin

Contains sea stars

a. Ophiuroidea

b. Asteroidea

c. Echinoidea

d. Crinoidea

e. Holothuroidea

Asteroidea

A sea star is most closely related to which of the following Echinoderms?

a. sea cucumbers

b. sea lily

c. brittle star

d. sea urchin

brittle star

Sea stars and sea urchins have gills similar to squid

True or False

False