Hormones are chemical substances that help to regulate processes in the body. Hormones are secreted by glands and travel to their target organs in the bloodstream. Hormones can be used to control human fertility.
Plant's reproduce via. pollen or seeds, whilst the animals reproduce by, and I quote, "getting on top of each other to have a fun time". Hope that helped
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D I guess because grinding optical glass and for polishing metals and has also been made into sandpapers and grinding wheels.
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The sunlight passes through the gas. Nothing happens.
