An Ecologist Studying Productivity in a Sample of Grasses Measures

question 11

Multiple Choice

An ecologist studying productivity in a sample of grasses measures gross primary productivity as 1000 kcal/m2/yr and autotrophic respiration as 100 kcal/m2/yr.Based on these calculations,the net primary productivity would be

• A)10 kcal/m2/yr.
• B)900 kcal/m2/yr.
• C)1100 kcal/m2/yr.
• D)10,000 kcal/m2/yr.

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Definitions:

Validity

The extent to which a test, tool, or research study measures what it purports to measure.

Mental Disorders

A broad category of conditions affecting mood, thinking, and behavior that impair normal functioning.

Reactivity

The tendency of individuals to modify their behavior when they are aware they are being observed.

Syndrome

A cluster of symptoms that usually occur together.