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 11
... birds , and which has flowers with separate sexes abso- lutely requiring the agency of certain insects to bring pol- len from one flower to the other , it is equally preposterous to account for the structure of this parasite , with its ...
... birds , and which has flowers with separate sexes abso- lutely requiring the agency of certain insects to bring pol- len from one flower to the other , it is equally preposterous to account for the structure of this parasite , with its ...
Page 15
... birds , with the rarest exceptions , hardly ever lay fertile eggs . Many exotic plants have pollen utterly worthless , in the same exact condition as in the most sterile hybrids . When , on the one hand , we see domesticated animals and ...
... birds , with the rarest exceptions , hardly ever lay fertile eggs . Many exotic plants have pollen utterly worthless , in the same exact condition as in the most sterile hybrids . When , on the one hand , we see domesticated animals and ...
Page 26
... bird , is also remarkable from the wonderful develop ment of the carunculated skin above the head , and this is ... birds the head and tail touch ; the oil - gland is quite aborted . Several other less distinct breeds might have ...
... bird , is also remarkable from the wonderful develop ment of the carunculated skin above the head , and this is ... birds the head and tail touch ; the oil - gland is quite aborted . Several other less distinct breeds might have ...
Page 27
... birds are clothed when hatched . The shape and size of the eggs vary . The manner of flight differs remarkably ; as does in some breeds the voice and disposition . Lastly , in certain breeds , the males and females have come to differ ...
... birds are clothed when hatched . The shape and size of the eggs vary . The manner of flight differs remarkably ; as does in some breeds the voice and disposition . Lastly , in certain breeds , the males and females have come to differ ...
Page 28
... birds breeding on precipices , and good fliers , are un- likely to be exterminated ; and the common rock - pigeon , which has the same habits with the domestic breeds , has not been exterminated even on several of the smaller British ...
... birds breeding on precipices , and good fliers , are un- likely to be exterminated ; and the common rock - pigeon , which has the same habits with the domestic breeds , has not been exterminated even on several of the smaller British ...
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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