Photoreceptor proteins are light-sensitive proteins involved in the sensing and response to light in a variety of organisms. Some examples are rhodopsin in the photoreceptor cells of the vertebrate retina,phytochrome in plants, and bacteriorhodopsin<span> and bacteriophytochromes in some bacteria.
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Answer:
Explanation:
(in an echinoderm) each of a large number of small flexible hollow appendages protruding through the ambulacra, used either for locomotion or for collecting food and operated by hydraulic pressure within the water-vascular system.
Answer:
collects a multitude of sensory information; process, interpret, and integrate that information; and initiate appropriate responses throughout the body.
nerve cell or neuron
Explanation:
you see.... most sea turtles will return back to the place were they were born to make a nesting ground
