Two Small, Poorly Drained Lakes Lie Close to Each Other

question 2

Multiple Choice

Two small, poorly drained lakes lie close to each other in a northern forest. The basins of both lakes are composed of the same geologic substratum. One lake is surrounded by a dense Sphagnum mat; the other is not. Compared to the pond with Sphagnum, the pond lacking the moss mat most likely has ________.

• A) a lower concentration of bacteria
• B) a higher diversity of organisms
• C) a lower oxygen content
• D) a higher pH

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Definitions:

Transcranial Magnetic Stimulation (TMS)

A method of stimulating brain cells, using a powerful magnetic field produced by a wire coil placed on a person’s head; it can be used by researchers to temporarily inactivate neural circuits.

Temporarily Inactivated

Refers to something that has been made inactive or non-functional for a short period of time.

Brain Area

Specific regions within the brain that are associated with particular functions, such as the frontal lobes with decision making or the hippocampus with memory.

Endorphins

Natural chemicals in the body that interact with the brain's receptors to reduce pain and boost pleasure, resulting in a feeling of well-being.