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 9
... ON THE IMPERFECTION OF THE GEOLOGICAL RECORD On the absence of intermediate varieties at the present day - On the nature of extinct intermediate varieties ; on their number- 73 — A * On the vast lapse of time , as inferred from CONTENTS 9.
... ON THE IMPERFECTION OF THE GEOLOGICAL RECORD On the absence of intermediate varieties at the present day - On the nature of extinct intermediate varieties ; on their number- 73 — A * On the vast lapse of time , as inferred from CONTENTS 9.
Page 10
... present chapter .. 272 CHAPTER XI GEOGRAPHICAL DISTRIBUTION Present distribution cannot be accounted for by differences in phy- sical conditions - Importance of barriers - Affinity of the pro- ductions of the same continent - Centres of ...
... present chapter .. 272 CHAPTER XI GEOGRAPHICAL DISTRIBUTION Present distribution cannot be accounted for by differences in phy- sical conditions - Importance of barriers - Affinity of the pro- ductions of the same continent - Centres of ...
Page 13
... present to the past inhabitants of that continent . These facts , as will be seen in the latter chapters of this volume , seemed to throw some light on the origin of species - that mystery of mys- teries , as it has been called by one ...
... present to the past inhabitants of that continent . These facts , as will be seen in the latter chapters of this volume , seemed to throw some light on the origin of species - that mystery of mys- teries , as it has been called by one ...
Page 16
... are of the highest importance , for they determine the present welfare , and , as I believe , the future success and modification of every inhabitant of this world . Still less do we know of 16 INTRODUCTION CHAPTER I.
... are of the highest importance , for they determine the present welfare , and , as I believe , the future success and modification of every inhabitant of this world . Still less do we know of 16 INTRODUCTION CHAPTER I.
Page 26
... present empirical . Moreover , on the view of the origin of genera which I shall presently give , we have no right to expect often to meet with generic differences in our domesticated productions . When we attempt to estimate the amount ...
... present empirical . Moreover , on the view of the origin of genera which I shall presently give , we have no right to expect often to meet with generic differences in our domesticated productions . When we attempt to estimate the amount ...
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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