| A | B |
|---|
| cell | the smallest unit that can perform all life processes; cells are covered by a membrane and have DNA and cytoplasm |
| stimulus | anything that causes a reaction or change in an organism or any part of an organism |
| homeostasis | the maintenance of a constant internal state in a changing environment |
| sexual reproduction | reproduction in which the sex cells from two parents unite, producing offspring that share traits from both parents |
| asexual reproduction | reproduction that does not involve the union of sex cells and in which one parent produces offspring indentical to itself |
| heredity | the passing of genetic traits from parent to offspring |
| metabolism | the sum of all chemical processes that occur in an organism |
| producer | an organism that can make its own food by using energy from its surroundings |
| consumer | an organism that eats other organisms or organic matter |
| decomposer | an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients |
| protein | a molecule that is made up of amino acids and that is needed to build and repair body structures and to regulate processes in the body |
| carbohydrate | a class of energy-giving nutrients that includes sugars, starches, and fiber; contains carbon, hydrogen, and oxygen |
| lipid | a type of biochemical that does not dissolve in water |
| phospholipid | a lipid that contains phosphorus and that is a structural component in cell membranes |
| ATP | a molecule that acts as the main energy source for cell processes |
| nucleic acid | a molecule made up of subunits called nucleotides |
