Botany and Plant Science

As the microsporangia develop and mature, they expand and become the pollen sacs that house the pollen grains.

A typical angiosperm anther is bilobed, with each lobe containing two theca, making it dithecous.

The proximal end of the stamen filament is attached to either the thalamus (receptacle) or the petal of the flower.

A stamen consists of two main parts: the long, slender stalk called the filament and the terminal, bilobed structure called the anther.

The male reproductive structure is the androecium (composed of stamens) and the female reproductive structure is the gynoecium (composed of pistils/carpels).

Sharp needles, often found on cacti, serve as a defense mechanism to protect the plant from herbivores that might try to eat it.

The Lotus (Nelumbo nucifera) is the national flower of India, symbolizing purity and beauty.

The ovary is the part of the flower that contains ovules and is essential for seed production and reproduction.

Roots are the external parts of a plant that anchor it into the soil and absorb water and nutrients.

Thorns are sharp, external modifications of plant stems that serve as a defense mechanism to protect the plant from herbivores.

The anther is the part of the stamen that produces and contains pollen grains. Pollen is essential for the fertilization process in flowering plants.

After fertilization, the ovule develops into the seed while the ovary develops into the fruit. The ovule contains the egg cell which, when fertilized by pollen from the anther, becomes the embryo and develops into a seed with a protective seed coat. The pollen grain delivers the sperm cells but does not become part of the seed. The ovary surrounding the ovule grows into the fruit.

Cross-pollination is the transfer of pollen from the anther of one flower to the stigma of a flower on a different plant. Self-pollination occurs within the same flower or plant.