Ques. 1AIPMT 2012 (Mains)
Which one of the following organisms is correctly matched with its three characteristics?
- Pea : C3 pathway, endospermic seed, vexillary aestivation
- Tomato : twisted aestivation, axile placentation, berry
- Onion : bulb, imbricate aestivation, axile placentation
- Maize : C3 pathway, closed vascular bundles, scutellum
Answer
(3) Onion : bulb, imbricate aestivation, axile placentation
Solution
(1) Pea (Fabaceae) follows the C3 pathway and has vexillary aestivation, but its seed is non-endospermic. ⇒ Incorrect.
(2) Tomato (Solanaceae) has axile placentation and a berry, but its aestivation is valvate, not twisted. ⇒ Incorrect.
(3) Onion (Liliaceae) has an underground bulb, imbricate aestivation of perianth and a trilocular ovary with axile placentation. ⇒ Correct.
(4) Maize has closed vascular bundles and a scutellum, but it is a C4 plant. ⇒ Incorrect.
Answer: (3)