In Birds, the Areas or Tracts of Skin That Lack

question 26

Multiple Choice

In birds, the areas or tracts of skin that lack feathers or down are called:

• A) barbules
• B) orbitals
• C) rachis
• D) apteria

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Definitions:

Color Vision Deficiency

Color vision deficiency, often called color blindness, is the inability or decreased ability to see color or perceive color differences under normal lighting conditions.

Abnormality

In psychology, a deviation from the average or norm that is deemed significant enough to cause dysfunction or distress.

Cones

Photoreceptor cells in the retina of the eye responsible for color vision and function best in relatively bright light, as opposed to rods, which are more sensitive in dim light.

Hair Cells

Sensory receptors located in the inner ear that convert sound vibrations into electrical signals that the brain can interpret.