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The First Photoreceptors Are Thought to Have Evolved in ______________

question 72

Multiple Choice

The first photoreceptors are thought to have evolved in ______________.


Definitions:

Universal

A term applied to concepts, conditions, or principles that are thought to be applicable to all instances or in all cases.

Hunger

A physical sensation or condition resulting from the body's need for food.

Serotonin

A neurotransmitter involved in the regulation of mood, sleep, appetite, and pain perception, among other physiological processes.

PYY

A hormone concerned with hunger and the lack of hunger, part of the neuroendocrine system that influences appetite and food intake.

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