Who worked on embryological aspects and popularized the use of embryological characters in taxonomy?

Differentiate between Stamen and Pistil.

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.

Non-viable seeds are produced by

Rearrange the following events of sexual reproduction in the sequence in which they occur in a flowering plant: embryogenesis, fertilisation, gametogenesis, pollination.

In angiosperms,microsporogenesis and megasporogenesis are . . . . . . .