| A | B |
| stimulus | the cause of a change in an organism's environment that affects the activity of an organism |
| carbohydrate | molecule made of sugar |
| homeostasis | maintenance of a stable internal environment |
| heredity | passing of traits from one generation to the next |
| metabolism | the sum of all chemical activities that an organism performs |
| nucleic acid | molecule made up of subunits called nucleotides |
| consumer | organism that eats other organisms for food |
| decomposer | organism that braks down the nutrients of dead organisms or wasted for food |
| phospholipids | molecules that form much of the cell membrane |
| producer | organism that can make its own food |
| cell | membane-covered structure that contains oss materials necessary for life |
| asexual | reproduction in which a single paerent produces offspring that are identical to the parents |
| lipid | compound that cannot mix water and that is used to store energy |
| protein | large molecule made up of amino acids |
| ATP | energy in food is transfered to this molecule |
| sexual | reproduction in which two parents arenecessary to produce offspring that share characteristics of both parents |