Multiple Choice
Brittle stars differ from sea stars by
A) lacking pedicellariae.
B) lacking papulae,intestine,or an anus.
C) having the ambulacral grooves closed and covered with arm ossicles.
D) having tube feet without suckers.
E) all of the choices are correct distinctions.
Correct Answer:

Verified
Correct Answer:
Verified
Q77: How much nervous system does an echinoderm
Q78: A feature of the earliest echinoderms apparently
Q79: During metamorphosis of sea stars,the left side
Q80: The most active of all echinoderms are
Q81: Small projections between the ossicles of sea
Q82: The common name for chaetognaths is<br>A)arrow worms.<br>B)acorn
Q84: The crinoids<br>A)have the most primitive characters.<br>B)have far
Q85: The ancestor of the echinoderms had _
Q86: A sea star feeds by absorbing food
Q87: The five pairs of bursae in brittle