Based upon the comparisons of anoxygenic and oxygenic photosythesis, the entry of oxygen into the atmosphere is most directly attributed to

A) photosystem I.
B) the Calvin cycle.
C) photoreactivation.
D) photosystem II.
E) bacteriorhodopsin.


D) photosystem II.

Biology & Microbiology

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What would happen to the gas exchange rate within an insect if the circulatory system was compromised?

A. The gas exchange rate would increase slightly. B. The gas exchange rate would increase significantly. C. The gas exchange rate would be unaffected. D. The gas exchange rate would decrease significantly. E. The gas exchange rate would decrease slightly.

Biology & Microbiology

Why is the coral endosymbioant, zooxanthellae, sensitive to global warming?

What will be an ideal response?

Biology & Microbiology

The somatic senses include all of the following sensations EXCEPT

a. balance b. pain near the body surface c. temperature d. touch e. pressure

Biology & Microbiology

Occasional traits, such as the insect-capturing features of carnivorous plants, emerge because existing traits become used in novel ways. Such traits are known as ________

Fill in the blank(s) with correct word

Biology & Microbiology