- Life Sciences
a foreign substance, usually a protein, that stimulates the production of one or more antibodies. The foreign substance, which could be a virus, bacterium or toxin, can be from the external environment or from within the body.
the separation of large fat molecules into smaller drops for easy digestion.
a part of the brain that is located below the thalamus having numerous functions, such as: it...
thin layer of living tissue between the xylem and the phloem, which is able to divide to make...
an atmospheric gas made of three oxygen molecules bonded together (O3).