All of the Following Are Mechanisms That Provide an Anoxic

question 35

Multiple Choice

All of the following are mechanisms that provide an anoxic environment for nitrogen fixation in cyanobacteria EXCEPT

• A) formation of heterocysts.
• B) formation of chlorosomes.
• C) temporal separation of photosynthesis and nitrogen fixation.
• D) accumulation of large aggregates of cells.
• E) symbiotic associations with fungi or plants.

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Definitions:

Biological

Pertaining to the science of life or living organisms, focusing on the physical and chemical processes that occur within living things.

Eustress

Stress that is healthful.

Tend-And-Befriend Response

A behavior exhibited primarily by females as a response to stress, centering on nurturing activities and seeking social support.

Stress

The demand that is made on an organism to adapt.