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parthenogenesis造句
31. The group is generally hermaphroditic , although males are rare and female parthenogenesis is common in freshwater species. 32. Parthenogenesis – the production of offspring from an unfertilized egg – is a frequent contender, but parthenogenesis is unheard of in mammals. 33. Whether parthenogenesis is an evolutionary aberration or viable strategy remains debated. 34. Rotifers are unusual in that they often reproduce by parthenogenesis (some species, indeed, can reproduce only in this way). 35. The parthenogenesis population of Haemaphysalis longicornis Gansu strain in northern China was observed under laboratory conditions. Three hosts were needed in one generation.