The Elements of Social Science ...E. Truelove, 1861 - 592 páginas |
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Página 56
... produced . Another very remarkable instance of gemmation occurs in the insect called Aphis . This is the only insect in which gemmation occurs , for in- sects are too high in the scale of being for such a mode of reproduction . The ...
... produced . Another very remarkable instance of gemmation occurs in the insect called Aphis . This is the only insect in which gemmation occurs , for in- sects are too high in the scale of being for such a mode of reproduction . The ...
Página 57
... produced by gemmation and the other by true generation . Thus the medusae come from buds , while the polyps they give rise ... produce the rest , is to be considered an individual , it would do violence to many of our usual ideas on the ...
... produced by gemmation and the other by true generation . Thus the medusae come from buds , while the polyps they give rise ... produce the rest , is to be considered an individual , it would do violence to many of our usual ideas on the ...
Página 58
... produce the whole . Dr. Carpenter proposes to call all indi- viduals produced by gemmation , Zooids ( or apparent beings ) , and to restrict the term Zoon ( or true being ) to the collective product of one generative act . Thus it would ...
... produce the whole . Dr. Carpenter proposes to call all indi- viduals produced by gemmation , Zooids ( or apparent beings ) , and to restrict the term Zoon ( or true being ) to the collective product of one generative act . Thus it would ...
Página 62
... producing the sperm , and ano- ther the germ cells , one possessing the male and the other the female gen- erative ... produce . In the higher animals , there is a much more perfect sexual union . The male is furnished with an intro ...
... producing the sperm , and ano- ther the germ cells , one possessing the male and the other the female gen- erative ... produce . In the higher animals , there is a much more perfect sexual union . The male is furnished with an intro ...
Página 72
... produced from the central pith , which consists of untrans- formed cells , and the Polyp buds spring from germinal cells , which remain untransformed within the body of the parent . The more cellular a plant or an animal is , the ...
... produced from the central pith , which consists of untrans- formed cells , and the Polyp buds spring from germinal cells , which remain untransformed within the body of the parent . The more cellular a plant or an animal is , the ...
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Palavras e frases frequentes
agricultural amount animals arise become believe bodily body capital cause celibacy cells cervix chancre character checks to population chlorosis classes common cultivation cure death degradation depends discharge duty effect endeavour equal evils exercise existence fact feelings female frequently girls gonorrhoea gradually happiness human hypochondria ignorance important increase individual industry inflammation labor land law of population less live Malthus mankind marriage married matter means menorrhagia menstruation mental Mill mind misery mode moral morbid nature never old countries ovaries pain passions patient physical physician political economy poor poverty preventive intercourse principle of population produce profits proportion prostitution recognised regard religion remedy reverence rise says seminal sexual abstinence sexual intercourse sexual organs social society spermatorrhoea spermatozooids stricture suffering supernatural symptoms syphilis things tion treatment true truth ulcer urethra vagina venereal diseases views virtue wages whole woman womb women