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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
Comparing to cyclostomes (primitive vertebrates) what are the main novelties presented by fishes? Compared to cyclostomes, evolutionary novelties shown by fishes are: pectoral
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WHAT ARE THE CHARACTERISTICS OF POPULATION IN ANIMAL
#question.unique features of amoeba.
Advantages and disadvantages
Cell-mediated immunity: The immune reaction directed against the body cells which have been infected by viruses and bacteria; and are controlled by T cells.
What are the positions of actin and myosin molecules in the sarcomere before and during the muscle contraction? Schematically actin filaments attached perpendicularly to both s
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Define Interaction of niacin with other Nutrients? You may recall reading earlier that trypotophan present in dietary proteins is converted to niacin. There is an interdepend
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