The answer is D.
Melatonin is a molecule that is produced in the pineal gland and secreted into the blood. Melatonin then travels to different parts of the brain. It tells the brain and the rest of the body about the time of wake and sleep. It causes drowsiness and decreases body temperature to assist in the regulation of the sleep/wake cycle. The melatonin secretion into the blood is regulated by the endocrine system, by the hypothalamus which on gets stimulated by the light.
The answer is A.
Glucose in the sealed tube will be used up by the obligate anaerobe bacterium. This is because it is the only environment that satisfies the condition of having no air or oxygen for the organism to survive. The unsealed tube will obviously have air entering and exiting inside and therefore will not be a suitable environment for the organism. The control tube will have no change in color since it is uninoculated or in other words, no organism was put inside of it.
The bent or kinked form of retinal is combined with a protein called opsin.
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Answer:
Prokaryote! The ones with a nuclear membrane are Eukaryotes.
Hi the answer is they were from all parts of the world.
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