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| a microscopic structure containing nuclear and cytoplasmic material enclosed by a semipermeable membrane, the basic structural unit of all organisms |
| any modern theory of evolution holding that species evolve by natural selection acting on genetic variation |
| heterogenesis (ˌhɛtərəʊˈdʒɛnɪsɪs) | |
| —n | |
| alternation of generations another name for abiogenesis | |
| heterogenetic | |
| —adj | |
| hetero'genic | |
| —adj | |
| heteroge'netically | |
| —adv | |
heterogenesis het·er·o·gen·e·sis (hět'ə-rō-jěn'ĭ-sĭs)
n.
The production of offspring unlike the parents.