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Elsewhere in this regard it is stated that the epidermal
cells roots although different in that bear hairs, but "similar
in other respects, with the cells of the underlying tissue" which they clothe { Sachs
83 p.}, while cuticular cover is relatively thin, the epidermis also
stems (often continuing to differentiate forth) made up of layers
cells smaller and are often partitioned more vivid contrast of the structure
for more vivid contrast conditions. In contrast to the view that these
the relative difference is caused by the natural selection of favorable
changes, I can oppose the ample fact of dissimilarity in
the structure between underground and above-ground roots. While the roots are in
the dark and surrounded by raw land, the outer protective covers of even the most
the big ones are relatively thin, but just the randomness of growth
subjected to the constant action of light and air, they become cover,
related by nature the veil of branches. Can't stay
doubt that the action of the environment causes these and related
other changes, if we know, on the one hand that the roots can
directly to turn into shoots bearing leaves, on the other hand,
that some plants "indisputable roots are only underground shoots" and that
however, "their shipments and device fabric uniform
true roots, but do not have a root cap and, leaving the light on
the surface of the earth, continue to grow as shoots ordinary leaf" {Ibid.
p. 47.}. If, therefore, this differentiating influence of the medium so much
in highly developed plants inheriting pronounced type of structure, it
should be a comprehensive important in the primitive period, while the types not yet
undecided.
As in relation to the plants and animals we find
sufficient grounds for concluding that at that time, as particularly in
the structure of the cover parts should ascribe to natural exaction
favourable changes in the most common their traits developed under
the direct action of surrounding influences. Here we come to the limit
the changes that can be attributed to use and disuse. But we
can quite rationally to withdraw from this class of changes, those in which
variable part of the organism is played by a completely or mostly passive
role.
And in this ninth Chapter, he says concerning these and other such
examples: "Some of the above changes would be attributed, of course
exceptional value if they were applied to the plants in their natural
condition" (vol. I, p. 321). "Mr. Meehan in a wonderful article compares
29 varieties of American trees belonging to different classes, with their
the closest European relatives who grew up in close proximity such
same garden and the same most same conditions." Listing six
damn, that all these American forms in the same way differ from
related European forms, Darwin finds that can be deduced from this
only one conclusion, namely, that these features "were definitely caused by
long-lasting effect on trees of different climate of the two continents"
(vol. II, pp. 281-282).
However, we must note the fact that Darwin, assessing thus
the special effects of the entire amount of surrounding agents and their combinations did not accept
however, in attention to the more important effects of the General and permanent
the actions of these agents. However, these effects are not denied by Darwin, but they
taken without sufficient discussion In his essay "Animals and Plants
under Domestication" (t. II, p. 281) he mentions in some chapters
"Basis of biology" in which I discussed this interaction between the environment and
of the body, and ascribes to him some of the most common features. But although
in his expressions, he pays sympathetic attention to my argument, the
at least he does not agree to recognize this factor that broad participation in the
the Genesis of organic forms, which he, in my opinion, had. I myself, then,
and until recently, not seen, how vast and deep was
impact on the organization, which, as we now see, can be
traced back to the earliest results of this basic relationship between
organisms and the environment. I can add, 41 about this idea, speaking
here in a more developed form, expressed in my article
"Transcendental physiology," first published in 1857.
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