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When humans manipulate the genes of microorganisms the process is called3-7-2013
Hormones
Chemical messengers produced by the endocrine glands that regulate various bodily functions and processes.
Glands
Organs in the body that secrete hormones or other substances directly into the blood or surrounding tissues.
Organs
Structures composed of different tissues that perform specific functions within an organism, such as the heart, liver, or lungs.
Melatonin
A hormone produced by the pineal gland that regulates sleep-wake cycles.
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