In Some Gastropods,a(n)__________ Is Found on the Dorsal,posterior Margin of the Foot

Q19: The shell of a mollusc is secreted

Q20: Pigment cells of cephalopods are called<br>A)pinacocytes.<br>B)odontophores.<br>C)chromatophores.<br>D)erythrocytes.<br>E)nautilophores.

Q21: Which of the following is not a

Q22: Muscles responsible for closing the bivalve shell

Q23: Among molluscs,extension of body structures such as

Q25: Sperm packets of cephalopods are called<br>A)cecae.<br>B)stylets.<br>C)cocoons.<br>D)spermatophores.<br>E)gonophores.

Q26: The oldest part of the bivalve shell

Q27: The space between the mantle and foot

Q28: The rasping structure occurring in the mouth

Q29: The only living cephalopods that possess an