Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: May 9, 2025
And whatever may be his theoretical views, no naturalist will probably be disposed to demur to the following summary of that exposition: Living beings, whether animals or plants, are divisible into multitudes of distinctly definable kinds, which are morphological species.
And whatever may be his theoretical views, no naturalist will probably be disposed to demur to the following summary of that exposition: Living beings, whether animals or plants, are divisible into multitudes of distinctly definable kinds, which are morphological species.
That they exist in the earth, and are constantly developed into innumerable multitudes of living organisms, of almost inconceivable variety, in both the animal and vegetal world, is true, as he half-reluctantly admits in almost the identical language we here use. And he also admits that morphological cells, when once formed, continue to grow by their own individual power or inherent tendency.
Again the discovery of the centrosome as a distinct morphological element has still further added to the complexity of the life substance, and proved that neither nucleus nor cell substance can be regarded as the cell or as constituting life. It is true that we may not yet know the source of this centrosome.
Groups having the morphological character of species, distinct and permanent races in fact, have been so produced over and over again; but there is no positive evidence, at present, that any group of animals has, by variation and selective breeding, given rise to another group which was, even in the least degree, infertile with the first. Mr.
Certain anthropologists, somewhat ingenious in matters of science, have studied the question in such good faith that they have even proposed to inquire whether the more brilliant prize-winners show evidences of morphological superiority, congenital marks of a natural privilege, a brain more highly developed than that of mediocrity.
And, as a question of development, the formation of the radiate Echinoderm within its vermiform larva seems to me to be analogous to the formation of a radiate Medusa upon a Hydrozoic stock. But a Medusa is surely not the result of the coalescence of as many organisms as it presents morphological segments.
It is not now a question of the continuity of a stream, but of the continuity of a single evolutionary process, or, as Haeckel says, the continuity of the morphological chain which stretches from the lemurs up through tailed and tailless anthropoid apes to man.
At the beginning of the century, embryology was descriptive and clearly directed toward morphological goals; by the end of the century, a dynamic, more physiological attitude was apparent, and theories of development derived from an entirely different philosophic base.
Languages, on the other hand, readily fall into a natural arrangement, like that of which other vital products are susceptible, especially when viewed from their morphological side.... The externally visible structure of the cerebral and facial skeletons, and of the body generally, is less important than that no less material but infinitely more delicate corporeal structure, the function of which is speech.
Word Of The Day
Others Looking