Match the columns.

Column $I$	Column $II$
$(a)$ Testis and ovary	$(1)$ Part of reproductive organ that transports germ cells
$(b)$ Clitoris	$(2)$ Developing fleshy fold surrounding both sides of the urogenital groove
$(c)$ Oviduct	$(3)$ Gametes which produce germ cells
$(d)$ Scrotum,labium majora	$(4)$ Organs associated with sexual response

$I.$ Sperm cells,when released from the body and placed in a petri plate,remain alive for a much longer duration.
$II.$ Semen contains chemicals that cause the female's smooth muscles to contract.

Which of the following is not a secondary reproductive organ?

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 . . . . . .

What does the given figure represent?

If the number of chromosomes in most body cells of a mammal is $40$,the cells in the seminiferous tubule will have