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Science ch.9.1
| Term | Definition |
|---|---|
| cell | the basic unit of structure and function in living things. |
| tissue | a group of similar cells that perform a specific function in living things. |
| organ | a group of several different tissues. |
| sexual reproduction | the process by which a new organism develops from the joining of two sex-cells |
| fertilization | joining of egg and sperm |
| Asexual reproduction | the process by which a single organism identical to itself. |
| phylum | animals into about 35 major groups |
| vertebrates | animals with a backbone |
| invertibrates | animals without a backbone |