Members of this lineage are highly active, have a closed circulatory system, and have a high oxygen

requirement.



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


A

Biology & Microbiology

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The terms algae and protozoa have significant phylogenetic meaning

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With __________, an animal learns to associate an involuntary response to one stimulus with another

stimulus. Fill in the blank(s) with the appropriate word(s).

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a. aldosterone b. interleukins c. cytokines d. HCG e. thyroxine

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Which statement about the focusing of light by the eyes is true?

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