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 7
... intermediate varieties at the present day - On the nature of extinct intermediate varieties ; on their number - On the vast lapse of time , as inferred from the rate of deposition and of denudation - On the poorness of our palæonto ...
... intermediate varieties at the present day - On the nature of extinct intermediate varieties ; on their number - On the vast lapse of time , as inferred from the rate of deposition and of denudation - On the poorness of our palæonto ...
Page 25
... intermediate between two extremely different races or species , I can hardly believe . Sir J. Sebright expressly experimentised for this object , and failed . The offspring from the first cross between two pure breeds is tolerably and ...
... intermediate between two extremely different races or species , I can hardly believe . Sir J. Sebright expressly experimentised for this object , and failed . The offspring from the first cross between two pure breeds is tolerably and ...
Page 33
... intermediate links in the long lines of descent , yet admit that many of our domestic races have descended from the same parents - may they not learn a lesson of caution , when they deride the idea of species in a state of nature being ...
... intermediate links in the long lines of descent , yet admit that many of our domestic races have descended from the same parents - may they not learn a lesson of caution , when they deride the idea of species in a state of nature being ...
Page 48
... intermediate gradations , that naturalists do not like to rank them as distinct species , are in several re- spects the most important for us . We have every reason to believe that many of these doubtful and closely - allied forms have ...
... intermediate gradations , that naturalists do not like to rank them as distinct species , are in several re- spects the most important for us . We have every reason to believe that many of these doubtful and closely - allied forms have ...
Page 49
... intermediate links ; nor will the commonly - assumed hybrid nature of the in- termediate links always remove the difficulty . In very many cases , however , one form is ranked as a variety of another , not because the intermediate links ...
... intermediate links ; nor will the commonly - assumed hybrid nature of the in- termediate links always remove the difficulty . In very many cases , however , one form is ranked as a variety of another , not because the intermediate links ...
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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