| A | B |
|---|
| Organism | anything that is living |
| cell | all organisms are composed of one or more |
| Unicellular | organism with only one cell |
| multicellular | organisms with many cells |
| examples of unicellular organisms | bacteria, protozoa |
| chemicals | the substances that compose cells (carbs, water, DNA) |
| Energy | cells use this to carry on life's functions |
| Stimulus | a change in an organism's environment that causes it to react |
| response | how an organisms reacts to a stimulus |
| Growth | process of becoming larger, adding more cells |
| development | process of change as an organism becomes more complex |
| reproduction | produce similar offspring |
| spontaneous generation | mistaken belief that life arises from non-living things. |
| Redi | designed a controlled experiment to prove maggots did not arise from meat |
| Pasteur | designed an experiment to prove bacteria did not arise from broth |
| basic needs of all living things | water, food, living space, stable internal conditions |
| autotroph | organisms that makes own food |
| example of autotroph | plants make food from the sun's energy |
| heterotroph | must obtain energy by eating other organisms |
| homeostasis | maintenance of stable internal conditions |
| characteristics of all living things | cells, energy use, chemicals, response to surroundings, reproduction, growth & development, |
