- Life Sciences
the destruction of the enamel of a tooth owing to the action of bacteria that live in plaque.
part of the skeleton consisting of the skull, vertebral column, sternum and ribs.
series of interlinked food chains by which energy circulates within an ecosystem.
a drug that inhibits (slows down) the action of the nervous system.
the movement of molecules across a membrane against the concentration gradient, from an area of...