Question

Starfish, sea stars, and sea urchins are classified as echinoderms. What does the prefix "echin-" mean?

A
smooth skin
thin skin
С
striped skin
D
spiny skin
dry skin
Chemical reactions in the body involve heat.
Some of the reactions are called exothermic. What does the prefix exo" mean?

Answer 1

The prefix "echin-" means D. The prefix "exo" means outside/external.

Step-by-step explanation: