| → currents in the 1859 1860 1861 1866 1869 |
| the currents of 1872 |
|
| → case of an 1859 1860 1861 1866 1869 |
| OMIT 1872 |
|
| → within the body, 1859 1860 1861 1866 1869 |
| OMIT 1872 |
|
| → a case of very great difficulty 1859 1860 1861 1866 1869 |
| OMIT 1872 |
|
| → but 1859 1860 1861 1866 1869 |
| a case of great difficulty; but 1872 |
|
| → in the case of both 1859 1860 1861 1866 1869 |
| both with 1872 |
|
| → not rarely, some of them 1859 1860 1861 1866 1869 |
| OMIT 1872 |
|
| → with other individuals, 1859 1860 1861 1866 1869 |
| OMIT 1872 |
|
| → I am strongly inclined to suspect that, both in the vegetable and animal kingdoms, 1859 1860 1861 |
| I am strongly inclined to suspect, that, both in the vegetable and animal kingdoms, 1866 1869 |
| it appears that with animals and plants 1872 |
|
| → law 1859 1860 1861 1866 1869 |
| very general, if not universal, law 1872 |
|
| →currents in the
water offer an obvious means for an occasional cross.
in the case of flowers, I have as yet failed, after consultation with one of the highest authorities, namely, Professor Huxley, to discover a single
→case of an
hermaphrodite animal with the organs of reproduction so perfectly enclosed
→within the body,
that access from
and the occasional influence of a distinct
can be shown to be physically impossible. Cirripedes long appeared to me to
→a case of very great difficulty
under this point of
→but
I have been enabled, by a fortunate chance,
to prove that two individuals, though both are self-fertilising hermaphrodites, do sometimes cross. |
|
| It must have struck most naturalists as a strange anomaly that,
→in the case of both
animals and plants,
of the same family and even of the same genus, though agreeing closely with each other in
their whole organisation,
are
→not rarely, some of them
hermaphrodites, and some
unisexual. But if, in fact, all hermaphrodites do occasionally
→with other individuals,
the difference between
and unisexual
far as function is concerned,
very small. |
|
| From these several considerations and from the many special facts which I have collected, but which I am
here
to give,
→I am strongly inclined to suspect that, both in the vegetable and animal kingdoms,
an occasional intercross
distinct
is a
→law
of nature. I am well aware that there are, on this view, many cases of difficulty, some of which I am trying to investigate. Finally then, we may conclude that in many organic beings, a cross between two individuals is an obvious necessity for each birth; in many others it occurs perhaps only at long intervals; but in none, as I suspect, can self-fertilisation go on for perpetuity.
|
