Question

tell any 10 points on pollination ​

Answer 1

Pollination is the transfer of pollen from a male part of a plant to a female part of a plant, enabling later fertilisation and the production of seeds, most often by an animal or by wind


Pollinating agents are animals such as insects, birds, and bats; water; wind; and even plants themselves, when self-pollination occurs within a closed flower.

Pollination often occurs within a species. When pollination occurs between species it can produce hybrid offspring in nature and in plant breeding work.

In angiosperms, after the pollen grain has landed on the stigma, it develops a pollen tube which grows down the style until it reaches an ovary.


Sperm cells from the pollen grain then move along the pollen tube, enter an ovum cell through the micropyle and fertilise it, resulting in the production of a seed.


A successful angiosperm pollen grain (gametophyte) containing the male gametesis transported to the stigma, where it germinates and its pollen tube grows down the style to the ovary. Its two gametes travel down the tube to where the gametophyte(s) containing the female gametes are held within the carpel. One nucleus fuses with the polar bodies to produce the endosperm tissues, and the other with the ovule to produce the embryo[2][3] Hence the term: "double fertilization".

In gymnosperms, the ovule is not contained in a carpel, but exposed on the surface of a dedicated support organ, such as the scale of a cone, so that the penetration of carpel tissue is unnecessary. Details of the process vary according to the division of gymnosperms in question. Two main modes of fertilization are found in gymnosperms. Cycads and Ginkgo have motile sperm that swim directly to the egg inside the ovule, whereas conifers and gnetophytes have sperm that are unable to swim but are conveyed to the egg along a pollen tube.

Answer 2

1) Pollination is a process in which pollen is transferred to the female reproductive organs of seed plants, thereby enabling fertilization and reproduction through growth of the pollen tube and eventual release of sperm.

2) Both gymnosperms and angiosperms undergo pollination, although the mechanism for angiosperms is much faster and more complex.

3) Pollination is transfer of pollen grains from anther to stigma. Pollination is essential for seed and fruit formation.

There are two types of pollination which are as follows:

4)Self pollination: When pollen grains from same flower or some other flowers of the same plant are transferred to stigma is known as self pollination.

5)Cross pollination: When pollen grains from one plant is transferred to stigma of the flowers of other plant is known as cross pollination.

6) The pollination process within the plant involves the transfer of another plant’s pollen to the male or female part of the first plant.

7)Pollen grains land on the stigma of the plant.

8)A tube grows down through the length of the style or stalk connecting the stigma and ovary.The pollen grain will send sperm cells from the grain down to the ovary.

9)When the sperm cells reach the ovary and the egg cells, fertilization will occur, which will result in the formation of the seed.

10)The seeds are released from the parent plant and are able to grow into a full plant, continuing the reproductive cycle using the method of pollination