Question

Most important character of Brassica campestris is
A) False Septum
B) Parietal placentation
C) Ebracteate
D) Imbricate aestivation.

Answer 1

Hint: Brassica campestris belong to the kingdom Plantae, family Brassicaceae. It is an angiospermic plant. It is commonly known as yellow mustard which produces oil.

Complete Answer:
To solve this question we have to know about the distinctive features of the Genus Brassica.
Brassica genus plants are mainly agricultural and horticultural plants. They are commonly used for food and are mostly seasonal plants. These plants grow as small shrubs. Brassica campestris is widely cultivated as a leafy vegetable, root vegetable and an oil yielding plant.
Some characteristics of Brassicaceae are- flowers are actinomorphic and hermaphrodite. They do not have false septum rather they possess an oblique septum. The style and stigma are short and bifid. They exhibit parietal placentation due to the presence of a superior ovary. One or more than one ovule is present.

Leaves are simple and alternate. Petals are polypetalous. They are arranged in one whole alternate with sepals. This kind of arrangement is a characteristic feature of this family. It is known as the cruciform arrangement. They show valvate aestivation.

Thus, the correct answer is (B). The parietal placentation is an important character of Brassica campestris or yellow mustard.

Additional Information: The plants belonging to this family are used as vegetables. Cabbage, Cauliflower, broccoli, radish, and turnip belong to the family Brassicaceae. Few plants like Lepidium are used as medicines to cure cough, asthma. Some are used as ornamental plants.

Note: Aestivation means the arrangement of petals and sepals in a flower. In valvate aestivation the sepals and petals do not overlap. Rather, they are present separately.