Radial symmetry is found in the flowers of (NEET 2016 (Phase II))
Answer: (A) Brassica. Radial (actinomorphic) symmetry means the flower can be divided into two equal halves in any radial plane through the centre — NCERT gives mustard (Brassica) as an example.
- A.Brassica✓
- B.Trifolium
- C.Pisum
- D.Cassia
Correct Answer
(A) Brassica
Solution & Explanation
Radial (actinomorphic) symmetry means the flower can be divided into two equal halves in any radial plane through the centre — NCERT gives mustard (Brassica) as an example. Trifolium, Pisum and Cassia are leguminous flowers that are zygomorphic (bilaterally symmetrical), so only Brassica shows radial symmetry. NCERT Reference: Ch 5, p.62, lines 18-23 — "the flower may be actinomorphic (radial symmetry)" ... "it is said to be actinomorphic, e.g., mustard, datura, chilli. When it can be divided into two similar halves only in one particular vertical plane, it is zygomorphic, e.g., pea, gulmohur, bean, Cassia."