Two offspring developed in the same uterus but from the fertilization of two different ova are:

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

The female rabbit is:

Adolescence is a bridge linking .......... and .......... .
$(i)$ Adolescence $(ii)$ Childhood $(iii)$ Old age $(iv)$ Adulthood

Identify the parts $a, b, c,$ and $d$ in the given diagram of the human mammary gland.

$A.$ Humans reproduce .....
$B.$ Humans are $\ldots \ldots$
$C.$ Fertilization is .... in humans
$D.$ Male and female gametes are .....
$E.$ Zygote is .....
$F.$ The process of release of ovum from a mature follicle is called .....
$G.$ Ovulation is induced by a hormone called ......
$H.$ The fusion of male and female gametes is called .......
$I.$ Zygote divides to form ... which is implanted in the uterus
$J.$ The structure which provides vascular connection between the foetus and uterus is called ......
Fill in the blanks in the statements $A$ to $J$ above.