Why Are Deserts and Tundra Among the Least Productive Terrestrial

question 64

Multiple Choice

Why are deserts and tundra among the least productive terrestrial biomes?

• A)Water is not very easily accessible by plants in desert and tundra biomes,and both of these biomes experience extreme temperature conditions.Water availability and temperature are important limiting factors in net primary productivity (NPP).
• B)There is too much water available in the tundra and not enough available in the desert.The extreme temperatures of these biomes do not affect NPP.
• C)There is not enough sunlight available in either the tundra or the desert biomes to sufficiently support NPP.
• D)There is far too much sunlight and water available in both the desert and tundra biomes.These factors cause photosynthesis to be suspended and result in dramatically decreased NPP.

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Definitions:

Inspiration

The process of drawing air into the lungs, a vital part of the respiratory cycle.

Expiration

The process of expelling air out of the lungs during breathing; also refers to the end of a product's validity period.

Precordial Assessment

An evaluation of the front part of the lower chest wall, often to check for heart anomalies or abnormalities.

Apical Impulse

The pulse felt at the apex of the heart, typically located in the fifth left intercostal space at the midclavicular line.