Question

define pollination and its types

Answer 1

Pollination is when pollen grains from an anther, the male portion of a flower, are transferred to a female part in the flower, known as the stigma. In order for pollination to be successful, the pollen grains transferred must be from a flower of the same species.

After the pollen grains land on the stigma, they create a pollen tube through the length of the style or stalk connecting the stigma and ovary. Once the pollen tube is complete, the pollen grain will send sperm cells from the grain down to the ovary. When the sperm cells reach the ovary and the egg cells, fertilization will occur, which will result in the formation of the seed. The seed will then be released from the parent plant and will be able to grow into a plant and continue the reproductive cycle using the method of pollination.


Types of Pollination

Although all flowering plants rely on pollination for reproduction, there is a variation in how plants pollinate. There are two types of pollination, called self-pollination and cross-pollination.

Self-pollination is the more basic type of pollination because it only involves one flower. This type of pollination occurs when pollen grains from the anther fall directly onto the stigma of the same flower. Although this type of pollination is simple and quick, it does result in a reduction in genetic diversity because the sperm and egg cells of the same flower share genetic information.

Cross-pollination is a more complex type of pollination that involves the transfer of pollen from the anther of one flower to the stigma of a different flower. This type of pollination results in an increase in genetic diversity because the different flowers are sharing and mixing their genetic information to create unique offspring.

Answer 2

Pollination

Explanation:

• Defination-

When transfer of pollen grains takes place from the male anther of a flower to the female stigma of another flower by agents like birds and butterfly and produce offspring for future generation.

• Pollinator-

Pollination always depend upon some vectors which may be living or non living. Living agents are  birds, butterfly,moth,bats etc and non living agents are wind, water etc.

Types-Pollinations are of 2 types-i) Self pollination

                                                       ii) Cross pollination.

• Self pollination-

The type of pollination that occur between same flower or from another flower of the same plant species.

Example-Rice, oat, barley, wheat etc.

• Cross pollination-

The type of pollination that occur between flower or plant of one species with the flower and plant of another plant species.

Examples- cherry tree, apple tree, etc.