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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 |