Ques. 1AIPMT 2012 (Mains)
How many plants in the list given below have marginal placentation? Mustard, Gram, Tulip, Asparagus, Arhar, Sun hemp, Chilli, Colchicum, Onion, Moong, Pea, Tobacco, Lupin
- Four
- Five
- Six
- Three
Answer
(3) Six
Solution
As per NCERT, marginal placentation (placenta along the ventral suture of a monocarpellary ovary) is found in Fabaceae, e.g. pea.
⇒ Fabaceae members in the list: Gram, Arhar, Sun hemp, Moong, Pea, Lupin.
Others: Mustard – parietal; Tulip, Asparagus, Colchicum, Onion (Liliaceae) – axile; Chilli, Tobacco (Solanaceae) – axile.
∴ Number of plants with marginal placentation = 6
Answer: (3)