A region where old oceanic crust is being destroyed is called:

a. a spreading center.
b. a midocean ridge.
c. a seamount.
d. a subduction zone.
e. an atoll.


D

Biology & Microbiology

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Which of the following is least likely to be a cause of extinction?

a. asteroid impact b. human activity c. adaptive radiation d. continental drift e. climate change

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Which of the following ultimately provides the O2 used during the process of oxidative phosphorylation

-fermentation -light reactions of photosynthesis -Calvin cycle of photosynthesis -Krebs cycle -carbon fixation

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A type of lymphocyte called a(n) ________ detects cells with abnormal surface proteins and kills them

A) eosinophil B) NK cell C) neutrophil D) basophil E) mast cell

Biology & Microbiology

________ are glycoprotein spikes that protrude from the outer surface of the viral envelope.

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

Biology & Microbiology