Which of the Following Is NOT an Advantage Associated with Hydroelectric

question 13

Multiple Choice

Which of the following is NOT an advantage associated with hydroelectric dams?

• A) the amount of electricity can be changed rapidly
• B) there are no emissions of greenhouse gases or toxic contaminants
• C) the dam traps sediment that otherwise would be transported down the river
• D) the main source of energy, gravity, is free

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Definitions:

Angiosperm

A group of plants that have flowers and produce seeds enclosed within a carpel; the largest group of plants on Earth.

Carpels

The female reproductive organ of a flower, consisting of an ovary, a stigma, and usually a style.

Mature Ovary

The part of the female reproductive organ in angiosperms that has completed its development phase, typically containing the ovules and ready for fertilization.

Stigmatized Pollen Grain

a pollen grain that has been rejected or marked negatively by stigma cells, potentially due to species incompatibility in plant reproduction.