In the Change from Indirect Development to Direct Development in Sea

question 37

Multiple Choice

In the change from indirect development to direct development in sea urchins all of the following items are lost except

• A)pluteus larvA.
• B)metamorphosis.
• C)planktonic stage.
• D)developmental genes.
• E)stage with bilateral symmetry.

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Definitions:

Semicircular Canals

Three fluid-filled bony channels in the inner ear that play a critical role in maintaining balance by detecting head rotations.

Auditory Tubes

Tubes that connect the middle ear to the nasopharynx, which help equalize pressure between the ear and the throat, also known as Eustachian tubes.

Nystagmus

Rapid, involuntary eye movements that may be the result of drug or alcohol use, brain injury or lesion, or cerebrovascular accident (CVA).

Alcohol Rehabilitation

A process or program aimed at helping individuals recover from alcohol dependency and adopt a sober lifestyle.