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.
Answer:
Pressure with Height: pressure decreases with increasing altitude. The pressure at any level in the atmosphere may be interpreted as the total weight of the air above a unit area at any elevation. At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels.In addition, gravity is weaker at the equator due to centrifugal forces produced by the planet's rotation. It's also weaker at higher altitudes, further from Earth's centre, such as at the summit of Mount Everest
Taxonomy is the branch of science which deals with the naming, describing and classifying the living things which include the plants, animals, and microorganisms. From the given, the answer would be letter C as taxonomy does not only involved the naming.
Mitochondrion. A mitochondrion (mitochondria, plural), is a membrane-enclosed organelle that is found in most eukaryotic cells. Mitochondria are called the "power plants" of the cell because they are the sites of cellular respiration, where they use energy from organic compounds to make ATP (adenosine triphosphate)
Answer:
We should stop leaving plastic and trash on the ground and stop littering and leaving our stuff on the ground cause birds and other animals can get exteremly hurt we should also stop cutting trees down cause it is ruining heir homes and when the trees fall sqirells and chipmunks can get hurt the birds can fly away but that doesn't mean that they won't get hurt either.
Explanation:
