The Nurse Is Testing an Infant's Visual Acuity

question 25

Multiple Choice

The nurse is testing an infant's visual acuity.By which age should the infant be able to fix on and follow a target?

• A) 1 month
• B) 1 to 2 months
• C) 3 to 4 months
• D) 6 months

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Definitions:

Homeotic Genes

Genes that control the developmental fate of cells and thus the morphology of body parts in organisms.

Arabidopsis

A model organism in plant biology and genetics, specifically the small flowering plant Arabidopsis thaliana.

Imaginal Discs

Paired structures in an insect larva that develop into specific adult structures during complete metamorphosis.

Undifferentiated Cells

Cells that have not yet developed into specialized cell types, retaining the ability to divide and become any type of cell in the organism.