Each point: 1 Mark
After pollination,  male gamete present in the pollen grains moves into the ovules and fuses with the female gamete. The single cell resulting from this fusion is called a zygote. This process is called fertilization.

Explanation: 2 Mark
Diagram: 1 Mark
Amoeba is a single-celled organism. It begins the process of reproduction by the division of its nucleus into two nuclei. This is followed by division of its body into two, each part receiving a nucleus. Finally, two amoebae are produced from one parent amoeba. This type of asexual reproduction in which an animal reproduces by dividing into two individuals is called binary fission.

Each point: 1 Mark
1. After pollination, pollen grains from the stamen starts germinating on the stigma to give rise to pollen tubes.
2. The pollen tube grows through style to reach the ovule in the ovary.
3. As it reaches the ovule, the tip of the tube opens and releases the male gametes to fertilize the egg cell.
4. The fusion of the male and the female gamete results in the formation of zygote. The zygote develops into an embryo.
5. Fertilized ovary becomes a fruit and ovules develop into seeds.

Explanation: 3 Marks
Examples: 2 Marks
Budding - Budding is a method of asexual reproduction where a small outgrowth called bud is produced from the parent body. The bud grows and detaches from the parent body and gives rise to a whole new organism. This mode of reproduction is seen in yeast.
Fragmentation - Fragmentation is the process in which the body of the organism gets cut into smaller fragments. Each fragment gives rise to a new individual. This process is observed in simpler organisms like spirogyra.

Each point: 1 Mark
1. Only one parent is involved.
2. It is quicker than sexual reproduction.
3. No gametes are formed.
4. It does not involve fertilization.
5. There is no variation. Newly developed individuals are identical to their parents.