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 17
... probably have varied in the same manner . To judge how much , in the case of any variation , we should attribute to the direct action of heat , moisture , light , food , & c . , is most difficult : my impression is , that with animals ...
... probably have varied in the same manner . To judge how much , in the case of any variation , we should attribute to the direct action of heat , moisture , light , food , & c . , is most difficult : my impression is , that with animals ...
Page 21
... probably do occur ; but natural selection , as will hereafter be explained , will determine how far the new characters thus arising shall be preserved . When we look to the hereditary varieties or races of our domestic animals and ...
... probably do occur ; but natural selection , as will hereafter be explained , will determine how far the new characters thus arising shall be preserved . When we look to the hereditary varieties or races of our domestic animals and ...
Page 24
... probably descended from several wild species , I can- not doubt that there has been an immense amount of in- herited variation . Who can believe that animals closely resembling the Italian greyhound , the bloodhound , the bull 24 [ CHAP ...
... probably descended from several wild species , I can- not doubt that there has been an immense amount of in- herited variation . Who can believe that animals closely resembling the Italian greyhound , the bloodhound , the bull 24 [ CHAP ...
Page 33
... probably arisen suddenly , or by one step ; many botanists , for instance , believe that the fuller's teazle , with its hooks , which cannot be rivalled by any mechanical contrivance , is only a variety of the wild Dipsacus ; and this ...
... probably arisen suddenly , or by one step ; many botanists , for instance , believe that the fuller's teazle , with its hooks , which cannot be rivalled by any mechanical contrivance , is only a variety of the wild Dipsacus ; and this ...
Page 34
... probably better acquainted with the works of agricultur- ists than almost any other individual , and who was him- self a very good judge of an animal , speaks of the prin- ciple of selection as " that which enables the agricultur- ist ...
... probably better acquainted with the works of agricultur- ists than almost any other individual , and who was him- self a very good judge of an animal , speaks of the prin- ciple of selection as " that which enables the agricultur- ist ...
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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