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Match List I with List II. List I: A. Rose; B. Pea; C. Cotton; D. Mango. List II: I. Twisted aestivation; II. Perigynous flower; III. Drupe; IV. Marginal placentation. Choose the correct answer from the options given below:
Rose = Perigynous (II); Pea = Marginal placentation (IV); Cotton = Twisted aestivation (I); Mango = Drupe fruit (III). Matches: A-II, B-IV, C-I, D-III!
Rose possesses perigynous flowers where the rim of the thalamus bears floral organs at the level of the half-inferior ovary (A -> II). Pea exhibits marginal placentation along the ventral suture of the monocarpellary ovary (B -> IV).
Cotton belongs to Malvaceae, showing twisted aestivation where one margin of an appendage overlaps that of the next (C -> I). Mango fruit develops from a monocarpellary superior ovary as a drupe with stony endocarp (D -> III).
The corresponding combination is A-II, B-IV, C-I, D-III, matching Option (3).
Diagnose every choice: Know exactly why the right option works and why distractors fail.
Mismatches Rose with Marginal placentation and Mango with Twisted aestivation.
Mismatches Pea with Drupe and Mango with Twisted aestivation.
Accurately pairs all four species with their distinctive morphological features.
Mismatches Rose with Drupe and Mango with Perigynous flower.
Confusing drupe fruits (mango, coconut) with hesperidium or berries.
"In rose, the flower is perigynous. In marginal placentation, the placenta forms a ridge along the ventral suture of the ovary (e.g. pea). In twisted aestivation, one margin overlaps the next (cotton). In mango and coconut, the fruit is known as a drupe."
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