The Physical Basis of SocietyD.Appleton, 1928 - 526 من الصفحات |
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الصفحة x
... Serve Plants 96 Rate of Reproduction 98 The Balance of Life 99 Checks to Increase 100 Food Habits 103 The Struggle for Existence Animal Associations 104 105 CHAPTER PAGE Insect Associations 108 Mutual Aid 109 V. MAN X CONTENTS.
... Serve Plants 96 Rate of Reproduction 98 The Balance of Life 99 Checks to Increase 100 Food Habits 103 The Struggle for Existence Animal Associations 104 105 CHAPTER PAGE Insect Associations 108 Mutual Aid 109 V. MAN X CONTENTS.
الصفحة xi
... Insects the Great Enemy Cotton Boll Weevil Corn Borer Gypsy 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 ...
... Insects the Great Enemy Cotton Boll Weevil Corn Borer Gypsy 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 ...
الصفحة 26
... insects Jurassic period : rise of birds and flying reptiles Triassic period : rise of dinosaurs Paleozoic Era . Age of Fish Dominance . Permian period : rise of reptiles ; another great ice age Pennsylvanian period : rise of insects and ...
... insects Jurassic period : rise of birds and flying reptiles Triassic period : rise of dinosaurs Paleozoic Era . Age of Fish Dominance . Permian period : rise of reptiles ; another great ice age Pennsylvanian period : rise of insects and ...
الصفحة 28
... Insects appear to be better equipped . Man feels the atomic vibrations known as heat . He sees as colors some of the vibrations of electrons but far beyond the range of his vision are other rays . The waves of the wireless telegraph and ...
... Insects appear to be better equipped . Man feels the atomic vibrations known as heat . He sees as colors some of the vibrations of electrons but far beyond the range of his vision are other rays . The waves of the wireless telegraph and ...
الصفحة 49
... insects or other pests , and new insect barriers ; ( 4 ) it may be the means of introducing new protozoan diseases and new carriers of dis- ease ; ( 5 ) it may be the means of erecting new forest bar- riers to migration , or new ...
... insects or other pests , and new insect barriers ; ( 4 ) it may be the means of introducing new protozoan diseases and new carriers of dis- ease ; ( 5 ) it may be the means of erecting new forest bar- riers to migration , or new ...
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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