If Gross Primary Productivity Is 120 Units Per Day, and the Respiration

question 26

Multiple Choice

If gross primary productivity is 120 units per day, and the respiration rate is 30 units per day, net primary productivity is _______ units per day.

• A) 4
• B) 30
• C) 90
• D) 120
• E) 150

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Definitions:

Deepest Marine Water

The section of the ocean that is furthermost below sea level, often located in ocean trenches.

River System

A network of rivers and streams that drain an area of land, including tributaries, main rivers, and often a delta where it meets an ocean or lake.

Deepest Marine Water

The water found at the greatest depths of the ocean, often characterized by cold temperatures and high pressure.

Ancient Mountain Front

The original forward edge or boundary of a mountain range, often eroded and buried, indicating past tectonic and geomorphological activity.