Echinodermata Class: Echinoidea

Question 1

What does Echinoidea mean?

Answer 1

Spiny form

Question 2

What organisms are in Echinoidea?

Answer 2

Sea urchins and sand dollars

Question 3

Two functions of spines in echinoids?

Answer 3

1. movement or locomotion
   2.defense (spiky spine)

Question 4

Function of Aristotle’s lantern?

Answer 4

chewing apparatus that cuts food into small pieces for ingestion