Question

In the diagram of types of placentation a, b, c and d represent.

• A. Basal, axile, parietal and free central
• B. Free central, parietal, basal and axile
• C. Axile, basal, parietal and free central
• D. Axile, free central, basal and parietal
• E. Parietal, axile, free central and basal

Answer 1

The correct option is C Axile, basal, parietal and free central

(a) The figure shows the multilocular ovary with ovules borne at the central placenta. This is called axile placentation as seen in Hibiscus, Allium etc.

(b) The figure shows the unilocular ovary with a single ovule borne at the base of the ovary. This is called basal placentation, as seen in Helianthus.

(c) The figure shows the unilocular ovary with ovules borne on peripheral placenta present on the fused margins. This is called parietal placentation, as seen in Brassica.

(d) The figure shows unilocular ovary with the ovules borne on the central axis of placenta which is not attached to the ovary wall by any septum. This is called free-central as seen in Dianthus.

Hence, the correct answer is 'Axile, basal, parietal and free central'