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 106
... similar plot be sown with several distinct genera of grasses , a greater number of plants and a greater weight of dry herbage can thus be raised . The same has been found to hold good when one variety and several mixed varieties of ...
... similar plot be sown with several distinct genera of grasses , a greater number of plants and a greater weight of dry herbage can thus be raised . The same has been found to hold good when one variety and several mixed varieties of ...
Page 110
... similar steps for any length of time ; some of the varieties , after each thousand generations , producing only a single variety , but in a more and more modified condition , some producing two or three varieties , and some failing to ...
... similar steps for any length of time ; some of the varieties , after each thousand generations , producing only a single variety , but in a more and more modified condition , some producing two or three varieties , and some failing to ...
Page 134
... similar than deep limestone caverns under a nearly similar climate ; so that on the common view of the blind animals having been separately created for the American and European caverns , very close similarity in their organisation and ...
... similar than deep limestone caverns under a nearly similar climate ; so that on the common view of the blind animals having been separately created for the American and European caverns , very close similarity in their organisation and ...
Page 136
... similar facts in Ceylon , and analogous observations have been made by Mr. H. C. Watson on European species of plants brought from the Azores to England . In regard to animals , several authentic cases could be given of species 136 LAWS ...
... similar facts in Ceylon , and analogous observations have been made by Mr. H. C. Watson on European species of plants brought from the Azores to England . In regard to animals , several authentic cases could be given of species 136 LAWS ...
Page 138
... similar purpose , and with much greater weight ; but until some one will sow , during a score of generations , his kidney - beans so early that a very large proportion are destroyed by frost , and then collect seed from the few ...
... similar purpose , and with much greater weight ; but until some one will sow , during a score of generations , his kidney - beans so early that a very large proportion are destroyed by frost , and then collect seed from the few ...
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Common terms and phrases
accumulated adapted affinities allied species America analogous ancient animals appear archipelago become bees believe birds breeds cause cells characters cirripedes climate closely allied colour continuous crossed crustaceans degree difficulty distinct species divergence domestic doubt embryo endemic existing exterminated extinct extremely facts favourable fertilised 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 increase individuals inhabitants inherited insects instance instincts intercrossing intermediate larvæ laws less living males mammals manner migration modification modified descendants natural selection naturalists nearly nest occasionally offspring organic organisation origin of species perfect pigeons plants pollen present principle probably produced progenitor ranked reciprocal crosses remarked resemble rock-pigeon rudimentary seeds sexual sexual selection Silurian slight sometimes South America sterility structure struggle successive supposed swimbladder tend theory variability variations varieties vary whole widely