The Physical Basis of SocietyD.Appleton, 1928 - 526 من الصفحات |
من داخل الكتاب
الصفحة xi
... Moth Scale Insects Crop Damage by Insects Methods of Attack on Enemy Insects 120 122 122 123 124 126 127 128 129 129 130 131 132 133 Birds and Man 133 Bird Census of the United States 134 Birds as Seed - Eaters 135 Birds as Grain ...
... Moth Scale Insects Crop Damage by Insects Methods of Attack on Enemy Insects 120 122 122 123 124 126 127 128 129 129 130 131 132 133 Birds and Man 133 Bird Census of the United States 134 Birds as Seed - Eaters 135 Birds as Grain ...
الصفحة 53
... moth Cave . Many of the bacteria , especially those which live as parasites in the bodies of animals are quickly killed by exposure to the sunlight . Few germs survive in the bright sunlight of arid regions . Animals vary in their re ...
... moth Cave . Many of the bacteria , especially those which live as parasites in the bodies of animals are quickly killed by exposure to the sunlight . Few germs survive in the bright sunlight of arid regions . Animals vary in their re ...
الصفحة 54
... moths which find difficulty in traveling against the wind . The gypsy moth has traveled northeast from the infection center in eastern Massachusetts more rapidly than it has gone southwest . Any one who has seen the streets of a mid ...
... moths which find difficulty in traveling against the wind . The gypsy moth has traveled northeast from the infection center in eastern Massachusetts more rapidly than it has gone southwest . Any one who has seen the streets of a mid ...
الصفحة 97
... moth . The fig industry of California was made possible by the importation in 1900 of an insect which fer- tilizes the blossoms of the Smyrna figs . Many animals besides man assist in the distribution of plants . Seeds are dropped by ...
... moth . The fig industry of California was made possible by the importation in 1900 of an insect which fer- tilizes the blossoms of the Smyrna figs . Many animals besides man assist in the distribution of plants . Seeds are dropped by ...
الصفحة 100
... moths , pro- ducing say 500 eggs , are represented next year by another pair of the same species , and no more : that is , out of 500 eggs , pro- ducing 500 caterpillars , 498 are destroyed in some way .... The important thing is that a ...
... moths , pro- ducing say 500 eggs , are represented next year by another pair of the same species , and no more : that is , out of 500 eggs , pro- ducing 500 caterpillars , 498 are destroyed in some way .... The important thing is that a ...
طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
acres Africa America appears areas Asia atoms average bacteria believe birds body carbon carbon dioxide cause cent century cephalic index changes characters chromosomes civilization climate color common copper crops cultivated culture danger Darwin death rate destroy disease domestic early earth eggs environment Europe European evidence fact feeble-minded females fish forms germ cells given heredity human Ibid important increase Indians individual inheritance insane insects iron killed known land later light living male man's marriage metals miles natural selection nature Negro neolithic organisms ovum oxygen Pará rubber tree parasites physical population possible pounds present problems produced R. S. LULL race seeds seems social South South America species square mile supply T. H. MORGAN temperature things thousand tion to-day trees tropics types United wild woman women