DENDROLOGY

Detailed explanation-1: -During the pollination process of higher plants, after the pollen germinates on the stigmatic surface, a pollen tube is formed from the pollen and extends down the style into the ovule; nuclei from the pollen travels through the pollen tube to fertilize the ovule.

Detailed explanation-2: -Fusion of the two gametes is required for seed formation. The male gametophyte is the pollen grain and the female gametophyte is the embryo sac 3. Immediately after arrival at the ovules, the pollen tube bursts and the pollen tube contents (PTC) are released to the female gametophyte 4.

Detailed explanation-3: -Pollination takes place before fertilization in plants. In pollination, pollen grains get transferred from anther to the stigma. After pollen grains reach stigma, then only fertilization can take place.

Detailed explanation-4: -Fertilization Process In flowers, the pollen grain germinates after the pollination of the carpel and grows into the style by creating the pathway for the pollen grain to move down to the ovary. The pollen tube opens into the ovule through the micropyle and bursts into the embryo sac.