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 viii
... successive appearance of new species - On their different rates of change - Species once lost do not reappear- Groups of species follow the same general rules in their appear- ance and disappearance as do single species - On Extinction ...
... successive appearance of new species - On their different rates of change - Species once lost do not reappear- Groups of species follow the same general rules in their appear- ance and disappearance as do single species - On Extinction ...
Page xv
... successive periods , and then re - stocked ; and he gives , as an alternative , that new forms may be generated " without the presence of any mould or germ of former aggregates . " I am not sure that I understand some passages ; but it ...
... successive periods , and then re - stocked ; and he gives , as an alternative , that new forms may be generated " without the presence of any mould or germ of former aggregates . " I am not sure that I understand some passages ; but it ...
Page 4
... successive 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 ...
... successive 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 ...
Page 30
... successive generations . May not those naturalists who , knowing far less of the laws of inheritance than does the breeder , and knowing no more than he does of the intermediate . links in the long lines of descent , yet admit that many ...
... successive generations . May not those naturalists who , knowing far less of the laws of inheritance than does the breeder , and knowing no more than he does of the intermediate . links in the long lines of descent , yet admit that many ...
Page 31
... successive varia- tions ; man adds them up in certain directions useful to him . In this sense he may be said to make for himself useful breeds . The great power of this principle of selection is not hypothetical . It is certain that ...
... successive varia- tions ; man adds them up in certain directions useful to him . In this sense he may be said to make for himself useful breeds . The great power of this principle of selection is not hypothetical . It is certain that ...
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Common terms and phrases
accumulated adapted affinities allied species America amount analogous ancient animals appear Asa Gray become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo 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 hybrids hybrids produced important individuals inhabitants inherited insects instance instincts intercrossing intermediate land larvæ laws less living male mammals manner Marsupials migration modification modified descendants mongrels natural selection naturalists nearly nest occasionally offspring organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor racter ranked reciprocal crosses remarked resemble rudimentary organs seeds Silurian slight South America sterility structure struggle successive supposed tend theory tion variability variations varieties vary whole widely