NEETBotanyMorphology of Flowering Plants
Which of the following statements correctly describes the arrangement of ovules within the ovary in plants like sunflower and marigold?
Options
- AThe placenta is axial and ovules are attached to it in a multilocular ovary.
- BThe placenta develops at the base of the ovary and a single ovule is attached to it.
- CThe ovules are borne on the central axis and septa are absent.
- DThe placenta forms a ridge along the ventral suture of the ovary and ovules are borne on this ridge.
Correct answer
B. The placenta develops at the base of the ovary and a single ovule is attached to it.
Step-by-step solution
Sunflower and marigold exhibit basal placentation. In basal placentation, the placenta develops at the base of the ovary and a single ovule is attached to it. The placenta being axial in a multilocular ovary describes axile placentation (e.g., tomato). Ovules borne on a central axis without septa describes free central placentation (e.g., Primrose). A placenta forming a ridge along the ventral suture describes marginal placentation (e.g., pea). Answer: The placenta develops at the base of the ovary and a single ovu