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a chemical messenger produced and released by a cell or a gland in one part of the body of the organism that affect cells in other parts of the organism. In essence, it is a chemical messenger that transports a signal from one cell to another. Only a small amount of hormone is required to alter cell metabolism. Hormones in animals are most often transported in the blood.
a series of numbers that represents the types and arrangement of the teeth of a mammal.
liquid that drains out of a landfill and is contaminated with solutes from the waste matter
a kingdom of plant-like unicellular and multicellular organisms that do not contain chlorophyll...
an inorganic compound with the formula KOH, commonly called caustic potash. It can be used to...