. Animal biology. Biology; Zoology; Physiology. DEVELOPMENT OF BIOLOGY 473 artificial and natural selection in the origin of species, but also the propounding of a theory of the origin of variations — that the direct action of the environment brings about modifications in the structure of animals and plants and these are transmitted to the offspring. (Fig. 307.) When Buffon's influence had passed its height, Erasmus Dar- win (1731-1802) expressed consistent views on the evolution of organisms, in several volumes of prose and poetry, which lead. Fig. 309. — Jean-Baptiste Lamarck. biologists to-
. Animal biology. Biology; Zoology; Physiology. DEVELOPMENT OF BIOLOGY 473 artificial and natural selection in the origin of species, but also the propounding of a theory of the origin of variations — that the direct action of the environment brings about modifications in the structure of animals and plants and these are transmitted to the offspring. (Fig. 307.) When Buffon's influence had passed its height, Erasmus Dar- win (1731-1802) expressed consistent views on the evolution of organisms, in several volumes of prose and poetry, which lead. Fig. 309. — Jean-Baptiste Lamarck. biologists to-day to recognize him as the anticipator of the La- marckian doctrine that somatic variations arise through the reac- tion of the organism to environmental conditions. "All animals undergo transformations which are in part by their own exertions, in response to pleasures, and pain, and many of these acquired forms or propensities are transmitted to their ; (Fig. 308.) Lamarck (1744-1829) developed with great care the first com- plete and logical theory of organic evolution and is the one out- standing figure in biological uniformitarian thought between Aris- totle and Charles Darwin. "For nature," he writes, "time is nothing. For all the evolution of the Earth and of living beings, nature needs but three elements, space, time, and ; In regard to the factors of evolution, Lamarck put emphasis on the indirect action of the environment in the case of animals, and the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Woodruff, Lorande Loss, 1879-1947. New York The Macmillan company
Size: 1441px × 1733px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, books, booksubjectphysiology, booksubjectzoology
