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Updated: May 9, 2025
They are also divisible into groups of individuals, which breed freely together, tending to reproduce their like, and are physiological species. Normally resembling their parents, the offspring of members of these species are still liable to vary, and the variation may be perpetuated by selection, as a race, which race, in many cases, presents all the characteristics of a morphological species.
We use the term "vital unit" in the same restricted sense in which the materialists speak of "chemical units," "morphological units," etc., which they admit are invisible in the microscopic field, and hence they can have no positive information as to their destructibility or indestructibility by heat.
The manner in which the petals are folded in the bud is in most groups a very constant morphological character; but Professor Asa Gray states that with some species of Mimulus, the aestivation is almost as frequently that of the Rhinanthideae as of the Antirrhinideae, to which latter tribe the genus belongs. Aug. St.
As a matter of fact, it is possible to draw such a sharp morphological distinction a distinction based on anatomic structure between the fore and hind extremity. In the formation both of the bony skeleton and of the muscles that are connected with the hand and foot before and behind there are material and constant differences; and these are found both in man and the ape.
They went to the Zoological Gardens together one Saturday to see for themselves a point of morphological interest about the toucan's bill that friendly and entertaining bird and they spent the rest of the afternoon walking about and elaborating in general terms this theme and the superiority of intellectual fellowship to all merely passionate relationships.
On the ground of careful comparative anatomical research, Huxley proved that in all morphological respects the differences between the highest and lowest apes are greater than the corresponding differences between the highest apes and man.
Hence they are likely to affect a whole morphological group here this does not matter , only part of a morphological group there and this may be disturbing. Thus, the old Anglo-Saxon paradigm: could not long stand unmodified. The o e alternation was welcome in so far as it roughly distinguished the singular from the plural.
Already, in his Croonian lecture of 1858, "On the Theory of the Vertebrate Skull," he had challenged, and by direct morphological investigation overthrown, the theory of Oken, adopted and enlarged upon by Owen, that the adult skull is a modified vertebral column.
As we have sufficiently proved already, it is for us a question of a totally different thing of the morphological and historical proof of the phylogenetic connection of these ancestors on the basis of their identity in internal structure and embryonic development; and I think I have sufficiently shown in the first part of this work how far this is calculated to reveal to us their inner nature and its historical development.
Truly it has been said, that to a clear eye the smallest fact is a window through which the Infinite may be seen. Turning from these purely morphological considerations, let us now examine into the manner in which the attentive study of the lobster impels us into other lines of research.
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