An Infant's Color Vision Approximates That of an Adult When

question 173

Multiple Choice

An infant's color vision approximates that of an adult when she/he is:

• A)2 months old.
• B)4 months old.
• C)1 year old.
• D)1½ years old.

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Definitions:

Hormonal Messages

Signals transmitted within the body by hormones, which are chemical messengers secreted by endocrine glands to regulate physiological processes.

Mineral Uptake

The process by which plants absorb minerals from the soil through their roots.

Phloem

Complex vascular tissue of plants; its living sieve elements compose sieve tubes that distribute sugars through the plant body. Each sieve element has an associated companion cell that provides it with metabolic support.

Sugars

Carbohydrates that taste sweet and are used by the body for energy.