Show:
True or False
Fill in the blank
100
All echinoderms have five body sections.
True
100
Unlike sea stars, brittle stars have _ and _ arms.
long,slender
200
Like humans and many other animals echinoderms have brains.
False, echinoderms have a nerve ring instead of a brain.
200
If a sea star loses an arm it can _ it.
regenerate.
300
An endoskeleton is on the outside of an echinoderms body.
False. Unlike arthropods who have an exoskeleton, which is on the outside of its body, an echinoderms' endoskeleton is on the inside of their body.
300
A water vascular system is _.
tubes filled with fluid within an echinoderms body.
400
A sea urchin has no arms
True, a sea urchin has no arms unlike other echinoderms.
400
A sea star will use its tube feet to _ and_
move and capture food.
500
Sea stars eat only other echinoderms.
False. Sea stars do eat other echinoderms, but they also eat crabs as well as mollusks.
500
Sea cucumbers have _,_, and_ bodies.
soft, flexible , muscular