The Downstream Portion of a River

question 46

Multiple Choice

The downstream portion of a river

• A)generally becomes more sluggish.
• B)generally is of higher velocity,although it is masked by reduced turbulence.
• C)features greater hydraulic action than do upstream portions.
• D)has lower discharges than do upstream portions.
• E)meanders as a result of the system operating to expend the most effort.

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Definitions:

Artificial Selection

The selection by humans of traits that are desirable in plants or animals and breeding only those individuals that have the desired traits. Compare with natural selection.

Broccoli

A green vegetable, belonging to the cabbage family, known for its high nutrient content and health benefits.

Kohlrabi

A vegetable in the cabbage family, with a bulbous stem that tastes similar to broccoli stems but sweeter. It can be eaten raw or cooked.

Adaptations

The process by which a species becomes fitted to its environment; it is the result of natural selection acting upon heritable variation.