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
... seeds that must be transported by certain 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 ...
... seeds that must be transported by certain 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 ...
Page 15
... seed ! In some few such cases it has been found out that very trifling changes , such as a little more or less water at some particular period of growth , will determine whether or not the plant sets a seed . I cannot here enter on the ...
... seed ! In some few such cases it has been found out that very trifling changes , such as a little more or less water at some particular period of growth , will determine whether or not the plant sets a seed . I cannot here enter on the ...
Page 16
... seed . These " sports " are extremely rare under nature , but far from rare under cultivation ; and in this case we see that the treatment of the parent has affected a bud or offset , and not the ovules or pollen . But it is the opinion ...
... seed . These " sports " are extremely rare under nature , but far from rare under cultivation ; and in this case we see that the treatment of the parent has affected a bud or offset , and not the ovules or pollen . But it is the opinion ...
Page 32
... several sorts , for instance a Ribston - pippin or Codlin - apple , conld ever have proceeded from the seeds of the same tree . In numerable other examples could be given . The explana- tion 32 [ CHAP . 1 DOMESTIC PIGEONS .
... several sorts , for instance a Ribston - pippin or Codlin - apple , conld ever have proceeded from the seeds of the same tree . In numerable other examples could be given . The explana- tion 32 [ CHAP . 1 DOMESTIC PIGEONS .
Page 36
... seed - raisers do not pick out the best plants , but merely go over their seed - beds , and pull up the " rogues , " as they call the plants that deviate from the proper standard . With animals this kind of selection is , in fact , also ...
... seed - raisers do not pick out the best plants , but merely go over their seed - beds , and pull up the " rogues , " as they call the plants that deviate from the proper standard . With animals this kind of selection is , in fact , also ...
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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