Which of the Following Animals Does Not Have a True

question 164

Multiple Choice

Which of the following animals does not have a true brain but rather has a pair of ganglia?

• A) jellyfish
• B) planaria
• C) earthworms
• D) grasshoppers
• E) more than one of these animals has ganglia

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Definitions:

Oxygen Saturation

The percentage of hemoglobin binding sites in the bloodstream occupied by oxygen, an important indicator of respiratory function.

Ishihara Method

A test for color blindness that uses a series of plates with colored dots to form numbers or shapes distinguishable only to those with normal color vision.

Color Vision Acuity

The ability of the eye to distinguish and identify different colors accurately.

Irrigated Eye

A medical procedure where the eye is flushed with a fluid to remove foreign materials or for treatment.