Members of the ____ lineage have a pair of hinged shells thatcan be closed by contraction of one or two adductor

muscles.



a. Cephalopoda
b. Polyplacophora
c. Platyhelminthes
d. Gastropoda
e. Scaphopoda


ANSWER: c

Biology & Microbiology

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The lipopolysaccharides are associated with the ____ membrane of Gram- ____ bacteria

a. outer; positive

b. outer; negative c. plasma; positive d. plasma; negative e. plasma; positive and negative

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The cyclin component of MPF is destroyed toward the end of which phase?

A) G1 B) S C) G2 D) M

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Demographic studies include all of the following except what?

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