| 单词 |
progenesis |
| 释义 |
progenesis, n. Biol.
Brit. |prə(ʊ)ˈdʒɛnɪsɪs|, U.S. |proʊˈdʒɛnəsəs|
[‹ pro- prefix2 + -genesis comb. form, after French progénèse (A. Giard & J. Bonnier 1887, in Travaux de l'Inst. Zool. de Lille et du Laboratoire de Zool. Maritime de Wimereux 5 ii. 195).]
Precocious sexual maturity in an organism still in a larval (or other immature) stage (= paedogenesis n.); (also) accelerated maturation of the sexual organs (as an evolutionary process) resulting in paedomorphosis (cf. neoteny n.).
1934Parasitology 26 121 The present paper deals with a further example of progenesis exhibited by a Trematode found encysted in Anaspides tasmaniae Thomson. 1963Q. Rev. Biol. 38 227/1 The frequent appearance of progenesis in digenetic species [of trematodes]. 1977S. J. Gould Ontogeny & Phylogeny vi. 179 We now..designate as ‘progenesis’ those cases of paedomorphosis produced by accelerated maturation and the precocious truncation of ontogeny. 1983Q. Rev. Biol. 58 221/1 Progenesis—the accelerated maturation of reproductive organs in an unaccelerated soma—appears to be a mechanism consistent with the origin of insects from myriapods. 1997Amer. Jrnl. Bot. 84 1333/1 Nine other mutations in pea..act to produce dramatic morphological changes, ranging from precocious flowering (progenesis) to slower rates of vegetative change (neoteny). 2000Jrnl. Parasitol. 86 768 Progenesis is thought to be a latitude-dependent phenomenon. |
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单词 progenetic 释义 progenetic, n. Biol.Brit. |prdntk|, U.S. |prodndk|[‹ pro- prefix2 + ......