Essays Upon Heredity and Kindred Biological Problems: Authorised TranslationWeismann, August
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Essays Upon Heredity and Kindred Biological Problems: Authorised Translation
Weismann, August
Evolution (Biology); Genetics; Reproduction
According to Götte’s[71] idea ‘the egg of a _Bombinator igneus_ before
fertilization cannot be considered to be a cell either wholly or in
part; and this is equally true of it at its origin and after its
complete development; it is only an essentially homogeneous organic
mass enclosed by a membrane which has been deposited externally.’ This
mass is ‘unorganised and not living[72],’ and ‘during the first
phenomena of its development all vital powers must be excluded.’ In
this way the continuity of life between two successive individuals is
always interrupted; or, as Götte says in his last essay:—‘The
continuity of life between individuals of which one is derived from the
other by means of reproduction, exists neither in the rejuvenescence of
the Monoplastides nor in the condition of the germ among the
Polyplastides—a condition which is derived from the former[73].’
This is quite logical, although in my opinion it is both unproved and
incorrect. But, on the other hand, it is certainly illogical for Götte
to derive the death of the Metazoa in a totally different way, i. e.
from the dissolution of their cell-colonies. It is quite plain that the
death of the Metazoa does not especially concern the reproductive
cells, but the individual which bears them; Götte must therefore seek
for some other origin of death—an origin which will enable it to reach
the body (_soma_)—as opposed to the germ-cells. If there still remained
any doubt about the failure to establish a correspondence between death
and the encystment of the Monoplastides, we have here, at any rate, a
final demonstration of the failure!
But there is yet another great fallacy concealed in this derivation of
the death of the Polyplastides.
Public-domain text, read in full here on John Shaqi.
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