Coral bleaching is a result of:
a. the calcareous skeleton begins to breakdown
b. extended periods of run-off.
c. pesticides from coastal developments.
d. corals expelling their zooxanthellae.
d
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In the absence of oxygen, can cells utilize the electron transport chain?
A. Yes, all cells can make use of the electron transport chain in the absence of oxygen via fermentation. B. No, oxygen is a required cofactor for the complexes in the electron transport chain. C. Yes, in the case that a cell can use a terminal electron acceptor other than oxygen, it can make use of the electron transport chain. D. No, oxygen is the primary electron acceptor in electron transport chains in all cell types.
When the size of a cell increases, the surface area/volume ratio
A) decreases initially and then begins to increase. B) remains the same. C) decreases. D) increases initially and then begins to decrease. E) increases.
In this scenario, the human body is __________
a. a macrohabitat b. made up of many life zones c. a microhabitat d. a niche
The site where a signal molecule binds to the surface of an enzyme is the ________ site.
Fill in the blank(s) with the appropriate word(s).