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
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What might happen to your red blood cells if you were suddenly unable to regulate the solute concentration of your blood and it began to rise?
A. Your blood cells would shrivel because water would move out of the cells via osmosis. B. Your blood cells would stay the same size. C. Your blood cells would enlarge and could rupture because water would move into the cells via osmosis. D. We do not have enough information to answer this question.
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
The cyclin component of MPF is destroyed toward the end of which phase?
A) G1 B) S C) G2 D) M
Demographic studies include all of the following except what?
A. sex ratio B. age structure C. growth rates D. measurements of interspecific competition E. mortality and survivorship curves