Ascidians are sac-like marine invertebrates. Their larvae have well-developed brains and dorsal nerve cords. This suggests that ascidians should be classified with the

A. annelids.

B. sponges.

C. chordates.

D. cnidarians.

Question

Ascidians are sac-like marine invertebrates. Their larvae have well-developed brains and dorsal nerve cords. This suggests that ascidians should be classified with the
 
 A. annelids. 
 
 B. sponges. 
 
 C. chordates. 
 
 D. cnidarians.

anonymous · Answer

Ascidians are commonly called sea squirts, and unlike sponges have spinal nerve cords in the larvae form.  So cancel out B right away.  If you recall the phylum that has dorsal (back) nerve cords in it...

Hint:  "Cord" $ \rightarrow $ "Chord"

I just realized, you've never given out a medal to anybody who has answered your questions...  :-(  I recall you saying you're behind a firewall to where you can't look up this stuff on your own, but wow never?  Why?

anonymous · Answer

Yes, you can look up closed questions by people.