On the Origin of Species by Means of Natural Selection: Or the Preservation of Favoured Races in the Struggle for Life |
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Page 5
... climate - Protection from the num- ber of individuals - Complex relations of all animals and plants throughout nature -Struggle for life most severe between individuals and varieties of the same spe- cies ; often severe between species ...
... climate - Protection from the num- ber of individuals - Complex relations of all animals and plants throughout nature -Struggle for life most severe between individuals and varieties of the same spe- cies ; often severe between species ...
Page 7
... climate and of the level of the land , and by occasional means - Dispersal during the Glacial period co - extensive with the world , • 302 CHAPTER XII . GEOGRAPHICAL DISTRIBUTION - Continued . Distribution of fresh - water ' productions ...
... climate and of the level of the land , and by occasional means - Dispersal during the Glacial period co - extensive with the world , • 302 CHAPTER XII . GEOGRAPHICAL DISTRIBUTION - Continued . Distribution of fresh - water ' productions ...
Page 11
... climate , food , & c . , as the only possible cause of variation . In one very limited sense , as we shall hereafter see , this may be true ; but it is preposterous to attribute to mere external conditions , the structure , for instance ...
... climate , food , & c . , as the only possible cause of variation . In one very limited sense , as we shall hereafter see , this may be true ; but it is preposterous to attribute to mere external conditions , the structure , for instance ...
Page 14
... climates and treatment , I think we are driven to conclude that this greater variability is simply due to our domestic produc- tions having been raised under conditions of life not so uniform as , and somewhat different from , those to ...
... climates and treatment , I think we are driven to conclude that this greater variability is simply due to our domestic produc- tions having been raised under conditions of life not so uniform as , and somewhat different from , those to ...
Page 17
... climate . Habit also has a decided influence , as in the period of flowering with plants when transported from one climate to another . In animals it has a more marked effect ; for instance , I find in the domestic duck that the bones ...
... climate . Habit also has a decided influence , as in the period of flowering with plants when transported from one climate to another . In animals it has a more marked effect ; for instance , I find in the domestic duck that the bones ...
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Common terms and phrases
accumulated adapted affinities allied species America amount ancient animals appear become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species disuse divergence domestic doubt embryo endemic Europe existing exterminated extinct extremely facts favourable fertility flowers formations forms fossil Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ laws less living look male mammals manner migration modification modified descendants natural selection naturalists nearly nest offspring organic organisation perfect pigeons pistil plants pollen present probably produced progenitor ranked reciprocal crosses remarked resemble rudimentary seeds sexual selection Silurian slight South America sterility structure struggle successive suppose swimbladder tend theory tion trees variability variation varieties vary whole widely