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 4
... slight variations . I will then pass on to the variability of species in a state of nature ; but I shall , unfortunately , be compelled to treat this subject far too briefly , as it can be treated properly only by giving long catalogues ...
... slight variations . I will then pass on to the variability of species in a state of nature ; but I shall , unfortunately , be compelled to treat this subject far too briefly , as it can be treated properly only by giving long catalogues ...
Page 10
... , the change at first appears to be directly due to such conditions ; but in some cases it can be shown that quite opposite conditions produce similar changes of structure . Nevertheless some slight amount 10 CHAP . I. VARIATION.
... , the change at first appears to be directly due to such conditions ; but in some cases it can be shown that quite opposite conditions produce similar changes of structure . Nevertheless some slight amount 10 CHAP . I. VARIATION.
Page 11
... slight amount of change may , I think , be attributed to the direct action of the conditions of life - as , in some cases , increased size from amount of food , colour from particular kinds of food , and perhaps the thickness of fur ...
... slight amount of change may , I think , be attributed to the direct action of the conditions of life - as , in some cases , increased size from amount of food , colour from particular kinds of food , and perhaps the thickness of fur ...
Page 13
... slight and those of considerable physiological importance , are endless . ) Dr. Prosper Lucas's treatise , in two large volumes , is the fullest and the best on this subject . No breeder doubts how strong is the tendency to inheritance ...
... slight and those of considerable physiological importance , are endless . ) Dr. Prosper Lucas's treatise , in two large volumes , is the fullest and the best on this subject . No breeder doubts how strong is the tendency to inheritance ...
Page 15
... slight deviations in their structure , in such case , I grant that we could deduce nothing from domestic varieties in regard to species . But there is not a shadow of evidence in favour of this view : to assert that we could not breed ...
... slight deviations in their structure , in such case , I grant that we could deduce nothing from domestic varieties in regard to species . But there is not a shadow of evidence in favour of this view : to assert that we could not breed ...
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Common terms and phrases
adapted affinities allied species America analogous ancient appear archipelago become bees believe birds breeds cause cells characters climate closely allied colour common continued crossed crustaceans degree difficulty distinct species doubt Edition eggs embryo Europe existing exterminated extinct extremely facts favourable Fcap females fertilised fertility flowers formation forms fossil Fritz Müller Gärtner genera genus geological geological period Glacial period gradations greater number groups of species habits Hence hermaphrodites History hybrids important individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ less living male mammals manner migration modification modified descendants natural selection naturalists nearly nest offspring organic organisation parent perfect pigeons pistil plants pollen Post 8vo present principle probably produced progenitor racters ranked reciprocal crosses remarked resemble rudimentary seeds Silurian slight South America stamens sterility structure struggle successive supposed theory tion variability variations varieties vary Vols whole widely Woodcuts