| A | B |
|---|
| Stimulus | Signal that causes an organism to react |
| Metabolism | Chemical reactions that occur in living things |
| Ingestion | Taking in food or producing food |
| Respiration | Taking in oxygen and using it to produce energy |
| Life Span | Maximum length of time an organism can be expected to live |
| Excretion | Process of getting rid of waste materials |
| Sexual Reproduction | Requires two parent cells |
| Asexual Reproduction | Requires one parent cell |
| Digestion | Process by which food is broken down into simpler substances |
| Response | Action, movement, or change in behavior caused by a stimulus |
| Organism | Any living thing |
| Food | Needed by living things to grow, develop, and repair body parts |
| Warmblooded Animals | Maintain a constant body temperature |
| Coldblooded Animals | Body temperatures change with the environment |
| Enzymes | Special types of proteins that regulate chemical activities |
| Compound | Two or more elements chemically combined |
| Elements | Pure substance that cannot be broken down into simpler substances |
| Organic Compounds | Found in living things and contain carbon |
| Inorganic Compounds | May or may not contain carbon |
| Amino Acids | Building blocks of proteins |
| Carbohydrates | Main source of energy for living things such as sugar and starch |
| Nucleic Acids | Store information that helps the body make proteins it needs |
| Proteins | Used to build and repair cells; made of amino acids |
| Lipids | Energy-rich compounds made of C, O, and H |
