NEET 2017 · BiologyGymnospermsPrevious Year Question
Select the mismatch :
Answer: (A) Pinus – Dioecious. Answer: (A) Pinus – Dioecious.
- A.Pinus – Dioecious✓
- B.Cycas – Dioecious
- C.Salvinia – Heterosporous
- D.Equisetum – Homosporous
Correct Answer
(A) Pinus – Dioecious
Solution & Explanation
Answer: (A) Pinus – Dioecious. Solution: In Pinus the male and female cones are borne on the SAME tree, i.e. it is monoecious, so 'Pinus – Dioecious' is the mismatch. The others are correctly matched: Cycas is dioecious (male cones and megasporophylls are borne on different trees), and the pteridophytes Salvinia (heterosporous) and Equisetum (homosporous) are correctly paired. NCERT Reference: Class XI Biology, Plant Kingdom, p.33, lines 17-19 — "The male or female cones or strobili may be borne on the same tree (Pinus). However, in cycas male cones and megasporophylls are borne on different trees".
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