Question

Identify the correct sequence of plants in the order of characters given below.
I. Ovules borne along the ventral sutura of unilocular ovary
II. Ovules develop all around the inner surface of septa in a multilocular ovary
III. Ovules borne on the inner walls of ovary with false septum$/$ septa.

• A. Helianthus, Brassica, Cucurbita
• B. Thespesia, Nymphaea, Brassica
• C. Abrus, Nymphaea, Brassica
• D. Abrus, Dianthus, Cucurbita

Answer 1

The correct option is C

Abrus, Nymphaea, Brassica

(i) Abrus belongs to the family Leguminosae. It shows the marginal placentation in which the placenta forms the ridge along the ventral suture of the ovary.

(ii) Nymphaea shows the superficial or the laminar placentation in which the ovules are borne on the inner surface of the ovary as well on the septa.

(iii) Brassica shows the parietal placentation in which the ovules are borne on the peripheral inner margins of the ovary. The ovaries are unilocular but due to the emergence of false septum called replum, the ovary appears bilocular.

Hence, the correct answer is 'Abrus, Nymphaea, Brassica'