The circulatory system below would be representative of a circulatory system found in a ____

a. frog
b. pig


c. bird
d. grasshopper
e. pig and a bird


ANSWER: a

Biology & Microbiology

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After a copper smelter begins operation, local downwind populations of plants begin to adapt to the resulting air pollution. Scientists document, for example, that the acid tolerance of several plant species has increased significantly in the polluted

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What type of chemical bond joins the bases of complementary DNA strands?

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All the following antimicrobial agents work by inhibiting cell wall synthesis except:

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