Capacitation refers to changes in the

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(C) : The sperms in the female genital tract are made capable of fertilising the egg by secretions of the female genital tract.These secretions remove

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sperm before fertilisation

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(C) : The sperms in the female genital tract are made capable of fertilising the egg by secretions of the female genital tract.These secretions remove coating substances deposited on the surface of the sperms,particularly those on the acrosome.Thus,the receptor sites on the acrosome are exposed and the sperm becomes active to penetrate the egg.This phenomenon of sperm activation in mammals is known as capacitation.

Column $I$	Column $II$
$(a)$ Multiplier phase	$(1)$ Undeveloped primary oocyte
$(b)$ Growth phase	$(2)$ Primary oocyte filled with developed cytoplasm
$(c)$ Maturation $1$	$(3)$ Secondary oocyte
$(d)$ Maturation $2$	$(4)$ Germinal epithelial cells

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In the testis,the immature germ cells produce sperm by $...A...$ at puberty. $...B...$ present on the inside wall of seminiferous tubules multiply by $...C...$ division and increase their number. Identify $A$,$B$,and $C$ from the above statement.

Match the columns.

Column $I$ Column $II$

$(a)$ Multiplier phase $(1)$ Undeveloped primary oocyte

$(b)$ Growth phase $(2)$ Primary oocyte filled with developed cytoplasm

$(c)$ Maturation $1$ $(3)$ Secondary oocyte

$(d)$ Maturation $2$ $(4)$ Germinal epithelial cells

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