The Origin of Species by Means of Natural Selection: Or the Preservation of Favored Races in the Struggle for Life |
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Page vi
... plants - Nature of the checks to increase - Com- petition universal - Effects of Climate - Protection from the number of individuals - Complex relations of all animals and plants throughout nature - Struggle for life most severe between ...
... plants - Nature of the checks to increase - Com- petition universal - Effects of Climate - Protection from the number of individuals - Complex relations of all animals and plants throughout nature - Struggle for life most severe between ...
Page 10
... plants and ani- mals when reared under new or unnatural condi- tions . Many facts clearly show how eminently sus- ceptible the reproductive system is to very slight changes in the surrounding conditions . Nothing is more easy than to ...
... plants and ani- mals when reared under new or unnatural condi- tions . Many facts clearly show how eminently sus- ceptible the reproductive system is to very slight changes in the surrounding conditions . Nothing is more easy than to ...
Page 11
... plants have pollen utterly worthless , in the same con- dition as in the most sterile hybrids . When , on the one hand , we see domesticated animals and plants , though often weak and sickly , breeding freely under confinement ; and ...
... plants have pollen utterly worthless , in the same con- dition as in the most sterile hybrids . When , on the one hand , we see domesticated animals and plants , though often weak and sickly , breeding freely under confinement ; and ...
Page 37
... plants is once pretty well established , the seed- raisers do not pick out the best plants , but merely go over their seed - beds , and pull up the " rogues , " as they call the plants that deviate from the proper standard . With ...
... plants is once pretty well established , the seed- raisers do not pick out the best plants , but merely go over their seed - beds , and pull up the " rogues , " as they call the plants that deviate from the proper standard . With ...
Page 42
... plants , when compared with the older varieties or with their parent - stocks . No one would ever expect to get a first - rate heartsease or dahlia from the seed of a wild plant . No one would expect to raise a first - rate melting pear ...
... plants , when compared with the older varieties or with their parent - stocks . No one would ever expect to get a first - rate heartsease or dahlia from the seed of a wild plant . No one would expect to raise a first - rate melting pear ...
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Common terms and phrases
adapted affinities allied species America ancient appear Asa Gray beak become bees believe belonging birds breeds cause cells characters climate closely allied colour common continent crossed crustaceans degree developed difficulty distinct species domestic doubt effects eggs embryo existing extinct extremely facts favourable fertilised fertility flowers formation forms fossil Fritz Müller genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate kind lamellę larvę less living males mammals manner marsupials migration modified descendants natural selection naturalists nearly nest occasionally offspring organisation organs parent peculiar perfect pigeon pistil pollen present principle probably produced progenitor quadrupeds ranked remarked resemblance rudimentary seeds sexual selection Silurian slight South America stamens sterility structure successive supposed swimbladder tend theory tion trees variability variations varieties vary whilst whole wings young