Choose the Correct Answer from the List Below

question 35

Multiple Choice

Choose the correct answer from the list below. Not all of the answers will be used.
-A versatile carrier of one-carbon units is _______________.

• A)atmospheric nitrogen (N₂)
• B)3-phosphoglycerate
• C)cumulative
• D)nitrogen fixation
• E)B₁₂
• F)histidine
• G)tetrahydrofolate
• H)committed
• I)pyridoxal phosphate
• J)enzyme multiplicity
• K)MoFe cofactor
• L)ammonia (NH₃)

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Definitions:

Arcopallium

A region of the bird brain involved in controlling vocal learning and complex motor functions.

Syrinx

The vocal organ in birds, located at the base of a bird’s trachea, which enables the production of complex sounds and birdcalls.

Proximate Levels

Describes immediate, underlying causes of biological processes or behaviors, focusing on how they occur.

Ultimate Levels

Explanations in biology that address why events occur, based on evolutionary significance and history.