Heartworm infections in dogs and cats are caused by a parasitic ________ that infests the heart of the animal.

A. rotifer
B. flatworm
C. roundworm
D. segmented worm
E. echinoderm


Answer: C

Biology & Microbiology

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The reducing agent during the Calvin cycle is:

A. NADPH. B. ATP. C. oxygen. D. NADH. E. FADH2.

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Which root part is involved in food storage?

A. dermal tissue B. ground tissue C. vascular cylinder D. root cap

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During reactions catalyzed by oxidoreductases an electron donor is

A) oxidized. B) reduced. C) synthesized. D) degraded. E) unaltered.

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Whose work proved conclusively that spontaneous generation of life from nonlife was not possible?

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Biology & Microbiology