The Low Productivity of Arctic Tundra Ecosystems Results

question 5

Multiple Choice

The low productivity of arctic tundra ecosystems results

• A) entirely because tundra has low evapotranspiration.
• B) entirely because tundra soils are low in nutrients.
• C) entirely because tundra soils retain water poorly.
• D) because tundra soils have low nutrients and retain water poorly.
• E) because tundra has low evapotranspiration and low-nutrient soils.

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Definitions:

Prefrontal Cortex

A region of the brain involved in decision making, cognitive behavior, and personality expression.

Somatic Nervous System

The subdivision of the peripheral nervous system that connects to sensory receptors and to skeletal muscles; sometimes called the skeletal nervous system.

Reticular Activating System

A network of neurons located in the brainstem that is responsible for regulating wakefulness and sleep-wake transitions.

Coding System

A method used to categorize, encode, and facilitate the analysis of data, often used in research and information technology.