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 10
... groups of species - On their sudden appearance in the lowest known fossiliferous strata 245 CHAPTER X ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS On the slow and successive appearance of new species - On their different rates of ...
... groups of species - On their sudden appearance in the lowest known fossiliferous strata 245 CHAPTER X ON THE GEOLOGICAL SUCCESSION OF ORGANIC BEINGS On the slow and successive appearance of new species - On their different rates of ...
Page 11
... groups subordinate to groups - Natural system- Rules and difficulties in classification , explained on the theory of descent with modification - Classification of varieties - Descent always used in classification - Analogical or ...
... groups subordinate to groups - Natural system- Rules and difficulties in classification , explained on the theory of descent with modification - Classification of varieties - Descent always used in classification - Analogical or ...
Page 36
... groups of birds , in nature . One circumstance has struck me much ; namely , that nearly all the breeders of the various domestic animals and the cultivators of plants , with whom I have conversed , or whose treatises I have read , are ...
... groups of birds , in nature . One circumstance has struck me much ; namely , that nearly all the breeders of the various domestic animals and the cultivators of plants , with whom I have conversed , or whose treatises I have read , are ...
Page 55
... group of organisms quite unknown to him , he is at first much perplexed to determine what differences to consider as specific ... groups and in other countries , by which to correct his first impressions . As he extends the range of his ...
... group of organisms quite unknown to him , he is at first much perplexed to determine what differences to consider as specific ... groups and in other countries , by which to correct his first impressions . As he extends the range of his ...
Page 60
... groups . As Fries has well remarked , little groups of species are generally clustered like satellites around certain other species . And what are varieties but groups of forms , unequally related to each other , and clustered round ...
... groups . As Fries has well remarked , little groups of species are generally clustered like satellites around certain other species . And what are varieties but groups of forms , unequally related to each other , and clustered round ...
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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