Echinoderms- Echinoidea

Question 0

What is their body structure?

Answer 0

Their bodies are covered with spines

Question 1

Echinoidea contains

Answer 1

Sea urchins, sand dollars, heart urchins, and sea biskets

Question 2

The test is the

Answer 2

Shell

Question 3

The test is the endoskeleton which is composed of

Answer 3

Ossicles fused together to create a solid shell like case to live in

Question 4

These organisms lack

Answer 4

Arms

Question 5

These organisms display what symmetry

Answer 5

Bilateral

Question 6

They move by using

Answer 6

Their spines and tubed feet that contain suckers

Question 7

Sea urchins use their spines to

Answer 7

Wedge themselves tightly among rocks

Question 8

Sand dollars and heart urchins like to burrow in

Answer 8

Sandy substrates

Question 9

A unusual five-toothed mouth is called

Answer 9

Aristotle’s Lantern

Question 10

Echinoidea use Asistotle’s Lantern to

Answer 10

Chew into stone surfaces to form a hiding place in rocks

Question 11

Mouths are located on

Answer 11

The oral surface

Question 12

The anus is on the

Answer 12

Aboral side

Question 13

Sea urchins posses well-developed coiled

Answer 13

Intestines and anus

Question 14

They feed on

Answer 14

Small diatoms and organic debris found on the bottom