Question

tell about pre fertilisation event in plants

please it's important​

Answer 1

Answer:Microsporangium (Pollen sac)- It is surrounded by four walls- epidermis, endothecium, middle layers, and tapetum. The pollen grains are formed in this. There are four pollen sacs. The centre of each sac comprises a group of compactly arranged homogenous tissues called sporogenous tissues.

Ovules- These are the place for the formation of female gametes. These are present at the bottom of a vase-like structure called carpel, which has a neck called style and an opening called stigma at the top.

Pollen Grains– It has variable sizes. It is double-walled, the inner wall is called endospore and composed of cellulose, the outer wall is composed of sporopollenin.

Anther- It is a bi-lobed structure. The two lobes are attached to the strip of the sterile part.

Stamen- It consists of a stalk called the filament. The proximal end of the filament is connected to the petal of the flower known as the thalamus

Explanation:

Answer 2

Explanation:

Pre fertilisation is the process that occurs before the actual fertilisation ,I. e, the process before the fusion of gamets . There are two events occurs before fertilisation :

Gametogenesis:Formation of male and female gamets.

Gamete transfer:Bringing the male and female gamets together