Identify the incorrect pair :
- Sphenopsida – Adiantum
- Pteropsida – Dryopteris
- Psilopsida – Psilotum
- Lycopsida – Selaginella
Answer
(1) Sphenopsida – Adiantum
Solution
Pteridophytes are classified into four classes: Psilopsida ( Psilotum), Lycopsida ( Selaginella, Lycopodium), Sphenopsida ( Equisetum) and Pteropsida ( Dryopteris, Pteris, Adiantum).
Adiantum belongs to Pteropsida, so Sphenopsida – Adiantum is the incorrect pair.
Answer: (1)