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 16
... causes much Extinction of the less improved forms of life , and leads to what I have called Divergence of Character . In the next chapter I shall discuss the complex and little known laws of variation and of corre- lation of growth . In ...
... causes much Extinction of the less improved forms of life , and leads to what I have called Divergence of Character . In the next chapter I shall discuss the complex and little known laws of variation and of corre- lation of growth . In ...
Page 19
... Causes of Variability - Effects of Habit - Correlation of Growth- Inheritance - Character of Domestic Varieties ... cause any appreciable amount of variation ; and that when the organisation has once begun to vary , it generally ...
... Causes of Variability - Effects of Habit - Correlation of Growth- Inheritance - Character of Domestic Varieties ... cause any appreciable amount of variation ; and that when the organisation has once begun to vary , it generally ...
Page 20
... causes monstrosities ; and monstrosities cannot be separated by any clear line of distinction from mere variations . But I am strongly inclined to suspect that the most frequent cause of variability may be attributed to the male and ...
... causes monstrosities ; and monstrosities cannot be separated by any clear line of distinction from mere variations . But I am strongly inclined to suspect that the most frequent cause of variability may be attributed to the male and ...
Page 21
... cause which produces sterility ; and variability is the source of all the choicest productions of the garden . I may add , that as some organisms will breed freely under the most unnatural conditions ( for instance , the rabbit and ...
... cause which produces sterility ; and variability is the source of all the choicest productions of the garden . I may add , that as some organisms will breed freely under the most unnatural conditions ( for instance , the rabbit and ...
Page 23
... caused the hoofs of all but the black varieties to drop off ; and one of the " crackers " ( i.e. Florida squatters ) ... cause having acted on both ; but when amongst individuals , apparently exposed to the same conditions , any very ...
... caused the hoofs of all but the black varieties to drop off ; and one of the " crackers " ( i.e. Florida squatters ) ... cause having acted on both ; but when amongst individuals , apparently exposed to the same conditions , any very ...
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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