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 38
... produced as perfect and as useful as we now see them ; indeed , in several cases , we know that this has not been ... produce any given feather in three years , but it would take him six years to obtain head and beak . " In Saxony the im ...
... produced as perfect and as useful as we now see them ; indeed , in several cases , we know that this has not been ... produce any given feather in three years , but it would take him six years to obtain head and beak . " In Saxony the im ...
Page 39
... produced by the accumulation in one direction , during successive gener- ations , of differences absolutely inappreciable by an uneducated eye - differences which I for one have vainly attempted to appreciate . Not one man in a thousand ...
... produced by the accumulation in one direction , during successive gener- ations , of differences absolutely inappreciable by an uneducated eye - differences which I for one have vainly attempted to appreciate . Not one man in a thousand ...
Page 50
... produced perfect , as that a complex machine should have been invented by man in a perfect state . I have not , at ... produce on different branches , or on the circumference and in the centre of umbels , & c . , flowers of a widely ...
... produced perfect , as that a complex machine should have been invented by man in a perfect state . I have not , at ... produce on different branches , or on the circumference and in the centre of umbels , & c . , flowers of a widely ...
Page 65
... produces a thousand seeds , of which on an average only one comes to maturity , may be more truly said to struggle with ... produced than can possibly survive , there must in every case be a struggle for existence , either one individual ...
... produces a thousand seeds , of which on an average only one comes to maturity , may be more truly said to struggle with ... produced than can possibly survive , there must in every case be a struggle for existence , either one individual ...
Page 66
... produced only two seeds - and there is no plant nearly so unproductive as this - and their seedlings next year produced two , and so on , then in twenty years there would be a million plants . The elephant is reckoned the slowest ...
... produced only two seeds - and there is no plant nearly so unproductive as this - and their seedlings next year produced two , and so on , then in twenty years there would be a million plants . The elephant is reckoned the slowest ...
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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