. Biology in America. Biology. 190 Biology in America case tliey are present in both sperm and egg cell; in the latter case only in the egg, the amount of cytoplasm in the typical sperm being too small to contain the ''organ-forming sub- ; If such formative stuffs are unequally distributed to dif- ferent daughter cells in the division of the egg, then we should expect each of these cells to give rise to a definite part of the embryo and to that part only. If, on the other hand, these. Please note that these images are extracted from scanned page images that may have been digitally


. Biology in America. Biology. 190 Biology in America case tliey are present in both sperm and egg cell; in the latter case only in the egg, the amount of cytoplasm in the typical sperm being too small to contain the ''organ-forming sub- ; If such formative stuffs are unequally distributed to dif- ferent daughter cells in the division of the egg, then we should expect each of these cells to give rise to a definite part of the embryo and to that part only. If, on the other hand, these. 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 Young, R. T. (Robert Thompson), b. 1874. Boston, R. G. Badger


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