On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for LifeThis is the 'second edition' of Darwin's Origin of Species. |
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Page 96
In the case of animals and plants with separated sexes, it is of course obvious
that two individuals must always (with the exception of the curious and not well-
understood cases of parthenogenesis) unite for each birth; but in the case of ...
In the case of animals and plants with separated sexes, it is of course obvious
that two individuals must always (with the exception of the curious and not well-
understood cases of parthenogenesis) unite for each birth; but in the case of ...
Page 99
... shown, and as I can confirm, either the anthers burst before the stigma is ready
for fertilisation, or the stigma is ready before the pollen of that flower is ready, so
that these plants have in fact separated sexes, and must habitually be crossed.
... shown, and as I can confirm, either the anthers burst before the stigma is ready
for fertilisation, or the stigma is ready before the pollen of that flower is ready, so
that these plants have in fact separated sexes, and must habitually be crossed.
Page 100
I believe this objection to be valid, but that nature has largely provided against it
by giving to trees a strong tendency to bear flowers with separated sexes. When
the sexes are separated, although the male and female flowers may be produced
...
I believe this objection to be valid, but that nature has largely provided against it
by giving to trees a strong tendency to bear flowers with separated sexes. When
the sexes are separated, although the male and female flowers may be produced
...
Page 103
Hence in animals of this nature, for instance in birds, varieties will generally be
confined to separated countries; and this I believe to be the case. In
hermaphrodite organisms which cross only occasionally, and likewise in animals
which unite ...
Hence in animals of this nature, for instance in birds, varieties will generally be
confined to separated countries; and this I believe to be the case. In
hermaphrodite organisms which cross only occasionally, and likewise in animals
which unite ...
Page 107
... widely separated in the natural scale. These anomalous forms may almost be
called living fossils; they have endured to the present day, from having inhabited
a confined area, and from having thus been exposed to less severe competition.
... widely separated in the natural scale. These anomalous forms may almost be
called living fossils; they have endured to the present day, from having inhabited
a confined area, and from having thus been exposed to less severe competition.
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action adapted allied America amount ancient animals appear become believe birds breeds cause chapter characters climate closely common compared considered continuous crossed descended developed difficulty distinct domestic doubt Edition effects existing extinct extremely facts families favourable fertility flowers follow formations forms genera genus geological give given groups habits hand Hence History hybrids important increase individuals inhabitants inherited insects instance instincts intermediate islands kind land laws less living look male manner means modification namely natural selection naturalists nearly never observed occur organic origin parent perfect period plants points Post 8vo present principle probably produced range ranked reason remarked Second seeds seems seen separated single slight sometimes species sterility structure struggle successive supposed tend theory tion variability variations varieties vary Vols whole widely Woodcuts
Bibliographic information
| Title | On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life |
| Author | Charles Darwin |
| Edition | 5 |
| Publisher | J. Murray, 1860 |
| Length | 502 pages |
| Export Citation | BiBTeX EndNote RefMan |