7.Some events are listed below.Arrange them in sequential order in such a way that will successfully produce seeds. A. Pollen tube formation B. Swelling of ovary C. Fertilisation D. Pollination E. Formation of pollen grains
Answers
The steps of sexual reproduction in plants are:-
1) Pollination- the pollen grains are carried by wind, water or insects and animals to reach the stigma of the flower.
This process of transfer of pollen grains is called pollination.
2) Germination- the pollen tubes begins to grow towards the egg cell.
These tubes are a pathway for the sperms or male gamete to reach the egg within the ovule.
3) Penetration of the Ovule- The pollen tubes reach the ovule where it penetrates the ovule to reach the female gamete or egg.
4) Fertilization- the male gamete travel down the pollen tubes and fertilize an egg.
In angiosperms, double fertilization takes place where both egg and the polar nuclei in the embryo sac are fertilized by the male gametes.
5) Post-fertilization- The flower withers and the ovary begins to grow to form a fruit.
The ovule develops into seeds inside the fruits.
So, the correct answer is 'Q→S→T→P→R'.