When Populations at a Given Trophic Level Are Controlled by Populations

question 93

Multiple Choice

When populations at a given trophic level are controlled by populations in the trophic level above them, they are said to be under

• A)top-down control.
• B)indirect control.
• C)bottom-up control.
• D)functional control.

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Definitions:

Intertidal

The coastal zone between high and low tide lines, experiencing both marine and terrestrial conditions.

Pelagic Zone

The open ocean area away from the coastal regions, covering the water column not located on the sea bed.

Phytoplankton

Community of tiny drifting or swimming photosynthetic organisms.

Spines

Stiff, sharp projections on plants or animals, serving as a defense mechanism or structural support.