The Physical Basis of SocietyD. Appleton, 1916 - 406 من الصفحات |
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الصفحة 46
... eggs to hatch the next year , larvæ to penetrate the earth , cocoons from which the new form comes , hibernation for bears , migration for birds , while every rotten log or hollow tree literally teems with dormant life . " The animal ...
... eggs to hatch the next year , larvæ to penetrate the earth , cocoons from which the new form comes , hibernation for bears , migration for birds , while every rotten log or hollow tree literally teems with dormant life . " The animal ...
الصفحة 58
... eggs . Some indeed depend more directly upon plants . Certain leaf - eating beetles are aquatic in their early stages . They have no gills , but attach them- selves to plants from which they get a direct supply of oxygen even under the ...
... eggs . Some indeed depend more directly upon plants . Certain leaf - eating beetles are aquatic in their early stages . They have no gills , but attach them- selves to plants from which they get a direct supply of oxygen even under the ...
الصفحة 63
... eggs of plant lice with their nests during the winter . The sanguinary robber ant occupies herself almost exclusively with hunting , and leaves the cultivation of plant lice to her slaves . " The hunting ants of Africa are accompanied ...
... eggs of plant lice with their nests during the winter . The sanguinary robber ant occupies herself almost exclusively with hunting , and leaves the cultivation of plant lice to her slaves . " The hunting ants of Africa are accompanied ...
الصفحة 71
... eggs , are represented next year by another pair of the same species , and no more : that is , out of 500 eggs , producing 500 caterpillars , 498 are de- stroyed in some way . The important thing is that a species abundant in number of ...
... eggs , are represented next year by another pair of the same species , and no more : that is , out of 500 eggs , producing 500 caterpillars , 498 are de- stroyed in some way . The important thing is that a species abundant in number of ...
الصفحة 73
... egg to adult and the progeny of a single pair may reach in a season 134 million . For some years it attracted ... eggs being deposited in the unripe boll which is de- stroyed as the insect develops . It hibernates in cotton stalks ...
... egg to adult and the progeny of a single pair may reach in a season 134 million . For some years it attracted ... eggs being deposited in the unripe boll which is de- stroyed as the insect develops . It hibernates in cotton stalks ...
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