| A | B |
|---|
| organism | a living thing |
| biology | the study of life |
| unicellular organism | organisms composed of only one cell |
| multicellular organism | living things made of more than one cell |
| differentiation | the process cell go through to become different from each other |
| homeostasis | maintaining stable internal conditions |
| reproduction | the process of producing new organisms from existing organisms |
| sexial reproduction | when hereditary information from two parts of the same organism or from two organisms of the same species is combined |
| asexual reproduction | when one cell organism makes an identical copy of itself |
| DNA | A large molecule that contains the instructions of life |
| gene | a single trait of an organism |
| to evolve | to change over time |
| evolution | the study of how living things have changed over time |
| natural selection | organisms with favorable traits can better survive and reproduce |
| ecology | the study of organisms interacting with each other and the environment |
| ecosystems | environmental communities |
| photosynthesis | the process of capturing energy from the sun and changing it into usable energy |
| heterotrophs | organisms that need to take in food to meet their energy needs |
| autotrophs | organisms that can make their own food |
| cell division | the formation of two cells from one cell |
| development | the process by which an adult organism |
