Which Bird Adaptation Is Probably Less Well-Developed in Flightless Birds

question 1

Multiple Choice

Which bird adaptation is probably less well-developed in flightless birds such as penguins and ostriches?

• A)honeycombed bone structure
• B)amniotic egg
• C)vertebrae
• D)presence of feathers

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Definitions:

Plant Hormones

Chemical substances produced by plants that regulate growth, development, and other physiological processes.

Phytochrome

A photoreceptor in plants that absorbs light primarily in the red and far-red regions, thereby regulating various aspects of growth and development.

Cryptochrome

A class of flavoproteins that are sensitive to blue light and have roles in the circadian rhythms of plants and animals.

Circadian Rhythm

A natural, internal process that regulates the sleep-wake cycle and repeats on each rotation of the Earth roughly every 24 hours.