Perform the Matrix Operation as Indicated

question 15

Multiple Choice

Perform the matrix operation as indicated.

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Definitions:

Benthic Zone

The ecological region at the lowest level of a body of water such as an ocean or a lake, including the sediment surface and some sub-surface layers.

Profundal Zone

A deep zone in a body of water, such as a lake, where sunlight does not penetrate, affecting the types of organisms that can live there.

Limnetic Zone

The open surface waters in a lake, away from the shore, where sunlight penetrates, supporting planktonic and free-swimming aquatic life.

Lakes

Inland bodies of standing freshwater or, in some cases, saline water, usually larger than ponds and contained by land.