Botany and Plant Science

Flower bears male and female reproductive parts which are involved in sexual reproduction.

Pistil or gynoecium bears ovary in a flower.

Scion is a cutting of young stem used for grafting.

Micropyle is an opening at the lower end of the ovule.

Radicle is a part of embryo of plants.

Pollination is the process of transfer of pollen grains from anthers to stigma of flower.

Plumule is a part of embryo that gives rise to shoots.

Radicle of embryo give rise to roots and thus forms the root system of the plants.

Self pollination does not produce variation in plants but leads to genetic uniformity.

Pistil develops pollen tube when pollen reaches stigma.

Stomata are minute apertures on plants, found typically on the outer leaf skin. 

The stem of cactus plant is very fleshy, it stores water and uses it very slowly in dry conditions.

This is the true characteristic of C4 plants.

This is the correct option.

Carpel is the female reproductive organ and stamen is the male reproductive organ and unisexual flower has either of them.