. General physiology; an outline of the science of life. . Fig. 71.—Amt^eba polypodia in six successive stages of division The dark body surrounded by a clear area in the interior is the nucleus, the pale body the contractile vacuole. (After F. E. Schulze.) becomes constricted in a similar manner between the two nuclei like a dumb-bell and creeps towards the two sides, until only a thin thread of protoplasm unites the two halves, this finally breaks so that two new Ammbce, each with one nucleus, result from the division. The process requires a long time, usually several hours, and does not alw
. General physiology; an outline of the science of life. . Fig. 71.—Amt^eba polypodia in six successive stages of division The dark body surrounded by a clear area in the interior is the nucleus, the pale body the contractile vacuole. (After F. E. Schulze.) becomes constricted in a similar manner between the two nuclei like a dumb-bell and creeps towards the two sides, until only a thin thread of protoplasm unites the two halves, this finally breaks so that two new Ammbce, each with one nucleus, result from the division. The process requires a long time, usually several hours, and does not always proceed smoothly: the protoplasm often flows together into one mass after a considerable constriction has taken place, and then flows apart again, until, finally, the uniting bridge is torn 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 Verworn, Max, 1863-1921; Lee, Frederic S. (Frederic Schiller), 1859-1939. London, Macmillan and co. , limited; New York, The Macmillan company
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