Q.

Identify the pair of plants that have flowers with actinomorphic symmetry and superior ovary

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a

Mustard and Ray floret of sunflower

b

Mustard and Chilli

c

Cassia and China rose

d

Datura and Rose

answer is B.

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Detailed Solution

When a flower can be divided into two equal radial halves in any radial plane passing through the centre, it is said to be actinomorphic, e.g., mustard, Datura, chilli. In the hypogynous flower the gynoecium occupies the highest position while the other parts are situated below it. The ovary in such flowers is said to be superior, e.g., mustard, china rose, chilli and brinjal. Cassia has zygomorphic symmetry. Rose has perigynous flowers and ray florets of sunflower has epigynous flowers.

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