Question

Circinate vernation in ferns refers to:

• A. Presence of adventitious roots on rhizome
• B. Attachment of sori on leaf surface
• C. System of leaf gaps in the stem
• D. Leaves are coiled like a spring when young

Answer 1

The correct option is D Leaves are coiled like a spring when young

The leaves in ferns possess apical meristem or growing point which however stop at maturity. Young leaves show characteristic circinate vernation or coiling like a watch spring. The coiling protects the growing point which comes to lie in the center.