Both Desert and Tundra Have Very Low NPP Values

question 192

Multiple Choice

Both desert and tundra have very low NPP values.What factor or factors determine NPP values in these two biomes?

• A) Both deserts and tundra are limited by temperature.
• B) Both deserts and tundra are limited by precipitation.
• C) Deserts are limited by precipitation and tundra by temperature.
• D) Deserts are limited by temperature and tundra by precipitation.
• E) Deserts and tundra are limited by nutrients, not by temperature or precipitation.

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Definitions:

Dipeptide

A molecule consisting of two amino acids linked by a single peptide bond.

Val-Tyr

A dipeptide composed of the amino acids valine and tyrosine, often used in biochemical studies.

Disulfide Linkage

A covalent bond formed between two sulfur atoms, often found in proteins to stabilize their three-dimensional structure.

Oxidized

The process or state in which an atom, ion, or molecule loses electrons, often making it more reactive.