Question

4. In a flowering plant, summarize the events that take place after fertilization

Answer 1

The process by which cells obtain chemical energy by the consumption of oxygen and the release of carbon dioxide is known as respiration. In order to carry on respiration, plant cells need oxygen and a means of disposing of carbon dioxide just as animal cells do. In plants, each part such as root, stem performs respiration because plants do not possess any specialized organs like animals for the exchange of gases.

The process of respiration is expressed as:

Glucose + Oxygen → Carbon Dioxide + Water (+ Energy)

We can conclude same from the above equation as well that respiration uses oxygen and produces carbon dioxide.

Answer 2

post fertilization, endosperm development takes place. this endosperm acts as a source of nourishment for the developing embryo. the primary endosperm nuclei(3n) is formed as a result of fusion between one male gamete and the two polar nuclei.
the zygote formed, undergoes cleavage to form the embryo.
meanwhile, the ovary develops into a fruit.
the ovules develop into seeds.
the integuments of the ovules form the seed coat.
the sepals and petals fall off the plant. hope it helps you.