Multiple Choice
To prevent taking back in the wastes it has just expelled,a standard sediment-inhabiting bivalve mollusk should position itself
A) with the incurrent siphon upstream.
B) with the excurrent siphon upstream.
C) in any direction, since it can control which way the water flows in either siphon.
D) either with the incurrent siphon upstream or with the excurrent siphon upstream, but not in any direction, since it can control which way the water flows in either siphon.
E) None of the choices are correct
Correct Answer:

Verified
Correct Answer:
Verified
Q4: The radula<br>A)not only rasps off fine food
Q5: The internal organs in coelomates are covered
Q10: The caudofoveates<br>A)are mostly worm-like,burrowing,marine organisms.<br>B)possess an oral
Q12: How do you account for the enormous
Q27: The intromittent organ of male cephalopods is
Q30: The _ _ projects into a bivalve
Q35: The main structures that taste food and
Q42: The Scaphopoda<br>A)lack a shell.<br>B)lack a mantle.<br>C)live in
Q45: Cephalopod eyes and vertebrate eyes are anatomically
Q48: Cephalopods feed on<br>A) microscopic organisms.<br>B) fish, molluscs,