The Downstream Portion of a River

question 50

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.

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Definitions:

Protists

A diverse group of eukaryotic organisms, mostly unicellular, that are not animals, plants, or fungi, including algae, amoebas, and others.

Primary Consumer

An animal that eats producers (e.g., plants or algae).

Decomposer

Organisms, primarily bacteria and fungi, that break down dead organic material, contributing to nutrient recycling in ecosystems.

Caterpillar

The larval stage of butterflies and moths, which is typically a voracious feeder on leaves before undergoing metamorphosis.