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Multiplication Phas - Stages of spermatogenesis
The initial cells in the germ line arc known as primordial germ cells (PCC). The PGC, which arise at some distance from the prospective gonads migrate into them and arc known as stem cells. The stem cells divide by mitosis and give rise to spermatogonial cells. The multiplication phase marks the production of a number of spermatogonia inside the testis.
Figure: Stages in spermatogenesis
PLACEN T A - Placenta is the intimate connection between the foehls and the uterine wall of the mother to exchange the materials. Placenta is a tempormy endocrine gland
Q. What are the respective functions of phospholipids, carbohydrates and proteins of the cell membrane? Membrane phospholipids have a structural function they form the bilipid
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#question.what are the organs of respiration in the lwer form of animals .
Features of Amphibian Gastrulation Major features of amphibian gastrulation are: Ectoderm surrounds the embryo by Epiboly. Gastrulation is initiated by a limited i
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