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The ovary is half inferior in:
Mustard, China rose, and Brinjal have Superior ovary (Hypogynous). Guava, Cucumber, and ray florets of Sunflower have Inferior ovary (Epigynous). Plum, Rose, and Peach have Half Inferior ovary (Perigynous)! Mark Plum (Option 4) in 5 seconds.
Based on the position of calyx, corolla, and androecium in respect of the ovary on thalamus, flowers are described as hypogynous, perigynous, and epigynous.
If gynoecium is situated in the centre and other parts of the flower are located on the rim of the thalamus almost at the same level, it is called perigynous. The ovary here is said to be half inferior.
The canonical NCERT examples of perigynous flowers with half inferior ovaries are Plum, Rose, and Peach.
Brinjal and Mustard have hypogynous flowers with superior ovaries. Sunflower ray florets have epigynous flowers with inferior ovaries.
Diagnose every choice: Know exactly why the right option works and why distractors fail.
Incorrect; Brinjal (Solanaceae) possesses a hypogynous flower with a superior ovary.
Incorrect; Mustard (Brassicaceae) has a hypogynous flower with a superior ovary.
Incorrect; ray florets of Sunflower have an epigynous flower with a completely inferior ovary.
Factually exact; Plum has a perigynous flower where the ovary is half inferior.
Hypogynous (Superior): "M-C-B" (Mustard, China rose, Brinjal). Perigynous (Half Inferior): "P-R-P" (Plum, Rose, Peach). Epigynous (Inferior): "G-C-S" (Guava, Cucumber, Sunflower ray florets).
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