NEETBotanyMorphology of Flowering Plants
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The ovary in mustard and argemone is initially one-chambered but it becomes two-chambered. Reason (R): In these plants, the ovules are borne on the central axis and septa are absent. In the light of the above statements, choose the most appropriate answer from the options given below:
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
C. (A) is correct but (R) is not correct
Step-by-step solution
Assertion (A) is correct because in mustard and argemone, the placentation is parietal. In this type, the ovary is initially one-chambered, but it becomes two-chambered due to the formation of a false septum (replum). Reason (R) is incorrect because the description provided (ovules borne on the central axis and septa absent) refers to free central placentation (found in Dianthus and primrose). In mustard and argemone, ovules develop on the inner wall of the ovary or on peripheral parts. Answer: (A) is correct but (