Observe the following part of a flowering plant. Prepare a note.

Explanation

The given diagram is the structure of ovule which is present in the ovary (Carpel) of plant.
(1) An ovule is an egg shoped structure attached by a stalk (female) to the inner side of the overy.
(2) Pollen grains reach stigma and travel through style. Pollen grains produce pollen tubes which contain two nuclei, They reach the ovule for fertilization.
(3) At the center of each ovule there is a microscopic embryo sac filled with food water.
(4) The embryo sac is composed of gametophyte cells.
(5) The majority of flowering plants have an embryo sac consisting of seven cells and eight nuclei.
(6) They are one egg (female gamete), two synergids, one central cell (secondary nucleus) and three antipodals.
(7) Central cell contains two nuclei, they are called polar nuclei.