Question

Placentation in Brassicaceae is:

• A. Parietal
• B. Marginal
• C. Axile
• D. Basal

Answer 1

The correct option is A

Parietal

The correct option is A.

Explanation for the correct option:

1. Placentation in Brassicaceae is of parietal type.
2. In such a kind of placentation, ovules are developed in the inner walls of the ovary.
3. Ovules may also be developed in the periphery.
4. In this, the ovary is first one chambered but then becomes two chambered when a false septum is formed.
5. The other three kinds of placentation given do not occur in Brassicaceae.

Explanation of incorrect options:

Option B:

1. The placenta creates a ridge along the ovary's ventral suture during marginal placentation, and the ovules are born on this ridge in two rows.
2. For example -Pea

Option C:

1. The placenta is said to be axile when it is axial and has several loci where the ovules are linked to it.
2. For example - tomato

Option D:

1. In basal placentation, which takes place close to the base of the ovary, one ovule is joined to the placenta.
2. For example - marigold
   

Final answer: Placentation in Brassicaceae is parietal.