The advantage of cleistogamy is

Match the following columns:

Column-$I$	Column-$II$
$(A)$ Clone	$(1)$ Agamospermy
$(B)$ Plant apomixis	$(2)$ Scion
$(C)$ Grafting	$(3)$ Callus
$(D)$ Tissue culture	$(4)$ Flower
$(E)$ Inflorescence	$(5)$ Ramet

Which one of the following is a monocarpic tree?

How many meiotic divisions are required to produce $101$ female gametophytes (embryo sacs) in an angiosperm?

Choose the correct option ($T$ = true,$F$ = false).
- If zygote develops outside the body,the animal is oviparous.
- In flowering plants,zygote is formed inside the ovule.
- During embryogenesis,embryo shows both cell division and cell differentiation.
- In flowering plants,the ovary develops into the fruit.

Which of the following is not a post-fertilization event?