. The elements of experimental embryology. Embryology, Experimental; Embryology. Fig. 44 Sea-urchin gastrulae and plutei from a whole egg (left) and a 1/2 blastomere (right). The latter are normal except in size. (From T. H. Morgan, Sci. Monthly, XVIII, 1924, p. 532.) is due to lack of material or to a real restriction of potency is obscure. In the Ascidian Styela, on the other hand, even the first two blastomeres, if isolated, will produce only half-embryos.^ It is true that the ectoderm grows over the whole surface of the half- embryo, that its notochord form a normally shaped bu
. The elements of experimental embryology. Embryology, Experimental; Embryology. Fig. 44 Sea-urchin gastrulae and plutei from a whole egg (left) and a 1/2 blastomere (right). The latter are normal except in size. (From T. H. Morgan, Sci. Monthly, XVIII, 1924, p. 532.) is due to lack of material or to a real restriction of potency is obscure. In the Ascidian Styela, on the other hand, even the first two blastomeres, if isolated, will produce only half-embryos.^ It is true that the ectoderm grows over the whole surface of the half- embryo, that its notochord form a normally shaped but half-sized rod, and that there is some rounding off of the general form. But in its essentials, the organisation is that of a left or right 1 Zoja, 1895, 1896; Maas, ~ Conklin, 1905, 1906. ^905. HEE. 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 Huxley, Julian, 1887-1975; De Beer, Gavin, Sir, 1899-1972. New York [Hafner Pub. Co. ]
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Keywords: ., bookcentury1900, bookcollectionbiodiversi, booksubjectembryology
