Heavy Metals, Such as Copper, Are Required for Proper Development

question 41

Multiple Choice

Heavy metals, such as copper, are required for proper development. However, if too much copper is present it can lead to developmental defects. A scientist was interested in studying the developmental defects that could occur at various concentrations of copper. Genetically identical organisms were grown in 6 different concentrations of copper. This experiment evaluates a(n) ________.

• A) epistasis
• B) dominant trait
• C) recessive trait
• D) norm of reaction

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Definitions:

Methedrine

A trademarked name for methamphetamine, a powerful central nervous system stimulant commonly used recreationally and, less commonly, for medical purposes.

Dexedrine

A brand name for dextroamphetamine, a central nervous system stimulant used to treat ADHD and narcolepsy.

Amphetamines

A class of stimulant drugs that affect the central nervous system to increase energy and alertness, often prescribed for attention deficit hyperactivity disorder (ADHD) and narcolepsy but also used illicitly.

Muscle Tension

The state in which muscles of the body remain semi-contracted for an extended period, which can be a response to stress, physical exertion, or neurological issues.