In flowering plants , arrange the following steps in their correct sequence .
(a) Formation of the embryo sac
(b) Megasporogenesis
(c) Formation of endosperm
(d) Fertilization
(e) Development of embryo

Options

A. `ararrbrarrcrarrdrarre`
B. `brarrararrdrarrcrarre`
C. `brarra rarrerarrcrarrd`
D. `brarrararrcrarrdrarre`

Answer

To arrange the steps in the correct sequence for the processes occurring in flowering plants, we can follow these steps:

1. **Megasporogenesis (b)**: This is the first step in the process where the megaspore mother cell undergoes meiosis to produce four haploid megaspores. This step is crucial as it sets the foundation for the formation of the embryo sac.

2. **Formation of the Embryo Sac (a)**: After megasporogenesis, one of the haploid megaspores will undergo mitotic divisions to form the embryo sac. This structure will eventually house the egg cell and other cells necessary for fertilization.

3. **Fertilization (d)**: Once the embryo sac is formed, fertilization occurs when the pollen tube delivers sperm cells to the egg cell within the embryo sac. This step is essential for the formation of the zygote.

4. **Formation of Endosperm (c)**: Following fertilization, the endosperm is formed. This tissue provides nourishment to the developing embryo and is formed from the fusion of a sperm cell with two polar nuclei in the embryo sac.

5. **Development of Embryo (e)**: Finally, after the endosperm is established, the embryo begins to develop. This is the last step in the sequence where the zygote develops into a mature embryo.

Putting it all together, the correct sequence is:
(b) Megasporogenesis → (a) Formation of the embryo sac → (d) Fertilization → (c) Formation of endosperm → (e) Development of embryo.