AP BIOLOGY

PLANTS

PLANT REPRODUCTION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is fertilisation?
A
The pollen grain land on the stigma, a tube grows down the style and the pollen grain fuse with the egg.
B
The ovules land on the anther, a tube grows down the filament and the ovules fuse with the pollen grain
C
The pollen grain land on the ovary, a tube grows into the ovules and the pollen grain fuse with the ovules.
Explanation: 

Detailed explanation-1: -Fertilization can be defined as the fusion of the male gametes (pollen) with the female gametes (ovum) to form a diploid zygote. It is a physicochemical process which occurs after the pollination of the carpel. The complete series of this process takes place in the zygote to develop into a seed.

Detailed explanation-2: -The stigma consists of male germ cell which enables reproduction in flowers. The main function of stigma is that the male germ cell transferred to the carpal (the female reproductive part) for fertilization.

Detailed explanation-3: -Plant Fertilization: the process of fusion of the female gamete, the ovum or egg and the male gamete produced in the pollen tube by the pollen grain. Fertilization in flowering plants was discovered by Strassburger in 1884. Flowers are the reproductive structures of angiosperms.

Detailed explanation-4: -Fertilization: The fusion of male and female gamete to form a zygote is called fertilization. As a result of pollination, pollen grains are deposited on the stigma of the carpel, and it grows into a pollen tube. The Pollen tube pierces the stigma and grows through style.

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