When Can Infants Usually Reach for Objects

question 78

Multiple Choice

When can infants usually reach for objects?

• A)By two months of age.
• B)By four months of age.
• C)By seven months of age.
• D)At birth.

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Definitions:

Water Potential

The potential energy of water per unit volume relative to pure water, which determines the direction water will flow.

Tension-Cohesion Model

A theory explaining how water moves through plants, relying on water's cohesive properties and the tension created by transpiration.

Tension-Cohesion Model

A theory explaining the movement of water through the xylem of plants, based on water molecule cohesion and tension created by evaporation.

Water Potential

A measure of the potential energy in water as well as the difference in potential energy between a given water sample and pure water, determining the direction water will flow.