| A | B |
|---|
| organic compounds | contain carbon |
| inorganic compounds | do not contain carbon |
| all living organisms | 1)have one or more cells, 2)sense/respond to change, 3)reproduce, 4)contain DNA, 5)use energy, 6)grow/develop |
| basic life needs | 1)food, 2)water, 3)air, 4)living space |
| cell | membrane-covered structure containing all materials necessary for life |
| stimulus | environmental change affecting the activity of an organism |
| homeostasis | organism's ability to maintain stable internal environment |
| asexual reproduction | one parent produces offspring identical to it |
| sexual reproduction | two parents produce offspring that share characteristics of both |
| DNA molecule | deoxyribonucleic acid, provides instructions for making protein molecules |
| metabolism | total of all the chemical activities an organism perfoms |
| producers | organisms that produce their own food |
| consumers | organisms that eat other organisms |
| decomposers | organisms that get their nutrients by breaking down dead organisms or organic waste |
| seventy percent | approximate amount of water in living organisms' cells |
| water | required for most metabolic chemical reactions in cells of living organisms |
| air | contains several gases |
| oxygen and carbon dioxide | two gases in air used by living organisms |
| living space | area that contains all of the necessary things an organism needs to survive |
| six life elements | carbon, hydrogen, nitrogen, oxygen, phosphorous, and sulfur are found in living organisms in various molecular combinations |
| five life molecules | proteins, carbohydrates, lipids, nucleic acids, and ATP, formed in cells from the six elements commonly present in organisms |
| ATP | adenosine triphosphate |
