The seed begins to germinate when there is adequate supply of water, air and favorable temperature.

Seeds absorb water and starts to swell.

The seed coat cracks even when it is not planted.

Secondary root develops from the meristem of the embryo.

In gymnosperm and in many dicotyledons, the primary root develops as a taproot.

In monocotyledon and some dicotyledons, the primary root is commonly long lived.

The cotyledons serve to store the food for the old plants.

As the stored food is used up, the cotyledons shrink and later they drop off.

Germination occurs when the seed starts to grow.

Water is required for germination.

Oxygen is needed in seed germination.

Temperature affects the growth rate of plants.

Seeds germinate only when the requirements are met.

Seeds does not contain an embryo.