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Quote by Ernst Haeckel

“Nothing is constant but change! All existence is a perpetual flux of "being and becoming!" That is the broad lesson of the evolution of the world.”

Quote by Ernst Haeckel

Book:Wonders of life

Work

Wonders of life

This comprehensive work delves into the diverse ecosystems, biological phenomena, and the interconnectedness of all living organisms, offering a rich tapestry of knowledge about the wonders of life on our planet. more

Author

German philosopher, biologist, artist, born on February 16, 1834, and died on August 9, 1919. Ernst Haeckel is renowned for his contributions to the fields of evolution, morphology, cytology, and the philosophy of natural sciences. more

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“Of these three essential factors, space might be said to be one with which biogeography is primarily concerned. However space necessarily interplays with time and form, therefore the three factors are as one of biogeographic concern.”

Said Might Form Science Three Space Evolution Essentials Concern Concerned Factors

Author:Leon Croizat

“On consideration, it is not surprising that Darwin's finches should recognize their own kind primarily by beak characters. The beak is the only prominent specific distinction, and it features conspicuously both in attacking behaviour, when the birds face each other and grip beaks, and also in courtship, when food is passed from the beak of the male to the beak of the female. Hence though the beak differences are primarily correlated with differences in food, secondarily they serve as specific recognition marks, and the birds have evolved behaviour patterns to this end.”

Source: Darwin's Finches

“On the whole, at least in the author's experience, the preparation of species-specific antiserum fractions and the differentiation of closely related species with precipitin sera for serum proteins does not succeed so regularly as with agglutinins and lysins for blood cells. This may be due to the fact that in the evolutional scale the proteins undergo continuous variations whereas cell antigens are subject to sudden changes not linked by intermediary stages.”

“One must believe that every living thing whatsoever must change insensibly in its organization and in its form... One must therefore never expect to find among living species all those which are found in the fossil state, and yet one may not assume that any species has really been lost or rendered extinct.”

Believe May States Form Science Found Lost Evolution Organization Assuming Species Fossils Living Things Never Expect

Author:Jean-Baptiste Lamarck

“All the acquisitions or losses wrought by nature on individuals, through the influence of the environment in which their race has long been placed, and hence through the influence of the predominant use or permanent disuse of any organ; all these are preserved by reproduction to the new individuals which arise, provided that the acquired modifications are common to both sexes, or at least to the individuals which produce the young.”

Long Use Young Science Individual Sex Loss Common Race Environment Influence Produce Evolution Arise Permanent Organs Acquisition Reproduction Modification

Author:Jean-Baptiste Lamarck

“So says the most ancient book of the Earth; thus it is written on its leaves of marble, lime, sand, slate, and clay: ... that our Earth has fashioned itself, from its chaos of substances and powers, through the animating warmth of the creative spirit, to a peculiar and original whole, by a series of preparatory revolutions, till at last the crown of its creation, the exquisite and tender creature man, was enabled to appear.”

Source: Outlines of a Philosophy of the History of Man

“The chemical differences among various species and genera of animals and plants are certainly as significant for the history of their origins as the differences in form. If we could define clearly the differences in molecular constitution and functions of different kinds of organisms, there would be possible a more illuminating and deeper understanding of question of the evolutionary reactions of organisms than could ever be expected from morphological considerations.”

“The decisive step in evolution, the first step toward macroevolution, the step from one species to another, requires another evolutionary method than that of sheer accumulation of micromutations.”

Firsts Science Steps Evolution Method Species First Steps Sheer Accumulation

Author:Richard Goldschmidt

“The distinguishing of the strata, or layers, in the embryonic membrane was a turning-point in the study of the history of evolution, and placed later researches in their proper light. A division of the (disc-shaped) embryo into an animal and a plastic part first takes place. In the lower part (the plastic or vegetative layer) are a serous and a vascular layer, each of peculiar organization. In the upper part also (the animal or serous germ-layer) two layers are clearly distinguishable, a flesh-layer and a skin-layer. (1828)”

Firsts Two Light Animal Study Evolution Research Skins Organization Flesh Division Peculiar Layers Plastic Germs Turning Points Embryos Discs Membranes

Author:Karl Ernst von Baer

“The doctrine of evolution implies the passage from the most organised to the least organised, or, in other terms, from the most general to the most special. Roughly, we say that there is a gradual 'adding on' of the more and more special, a continual adding on of new organisations. But this 'adding on' is at the same time a 'keeping down'. The higher nervous arrangements evolved out of the lower keep down those lower, just as a government evolved out of a nation controls as well as directs that nation.”

Wells Government Science Nations Term Special Evolution Higher Doctrine Nervous Passages Arrangements Organisation Organised

Book:Selected Writings of John Hughlings Jackson: Evaluation and dissolution of the nervous system. Speech. Various papers, addresses and lectures

Source: Selected Writings of John Hughlings Jackson: Evaluation and dissolution of the nervous system. Speech. Various papers, addresses and lectures