At menopause,there is a rise in the urinary excretion of:

Which two events in the life cycle maintain the same (constant) number of chromosomes?

Match the organs / parts of the human reproductive system in Column $I$ with the respective hormone / enzyme secreted by them in Column $II$.

Column $I$	Column $II$
$i$. Prostate gland	$a$. Hyaluronidase
$ii$. Acrosome of sperm	$b$. Inhibin
$iii$. Corpus luteum	$c$. Acid phosphatase
$iv$. Placenta	$d$. Human Chorionic Gonadotropin

Match the columns.

Column $I$	Column $II$
$(a)$ Mons pubis	$(1)$ Embryo development
$(b)$ Antrum	$(2)$ Sperm cell
$(c)$ Trophoblast layer	$(3)$ External genitals of female
$(d)$ Mitochondria	$(4)$ Graafian follicle

Fill in the blanks:
$(a)$ Humans reproduce . . . . . . (asexually/sexually)
$(b)$ Humans are . . . . . . (oviparous/viviparous/ovoviviparous)
$(c)$ Fertilization is . . . . . . in humans. (external/internal)
$(d)$ Male and female gametes are . . . . . . (diploid/haploid)
$(e)$ Zygote is . . . . . . (diploid/haploid)
$(f)$ The process of release of the ovum from a mature follicle is called . . . . . .
$(g)$ Ovulation is induced by a hormone called the . . . . . .
$(h)$ The fusion of the male and the female gametes is called . . . . . .
$(i)$ Fertilization takes place in the . . . . . .
$(j)$ The zygote divides to form . . . . . . which is implanted in the uterus.
$(k)$ The structure which provides vascular connection between the fetus and uterus is called . . . . . .

The figure given below depicts a diagrammatic sectional view of the human female reproductive system. Which set of three parts out of $I-VI$ have been correctly identified?