Holly Has Normal Intelligence, but Is Having Much Difficulty Learning

question 25

Multiple Choice

Holly has normal intelligence, but is having much difficulty learning to read. She does not have any vision or hearing problems that might explain her difficulty. Holly has characteristics of

• A) an attention deficit hyperactivity disorder.
• B) a learning disability.
• C) mild mental retardation.
• D) moderate mental retardation.

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Definitions:

Biologically Magnified

Refers to the process by which the concentration of toxic substances increases in each successive link in the food chain.

Trophic Level

The position an organism occupies in a food chain, determined by its feeding relationships.

Bacteria

Single-celled organisms that can exist either as independent (free-living) entities or as parasites (dependent upon another organism for life).

Vectors

Organisms, such as mosquitoes or ticks, that transmit pathogens between humans or from animals to humans.