Question

For a critical study of secondary growth in plants, which one of the following pairs is suitable?

• A. Wheat and maiden hair fern
• B. Sugarcane and sunflower
• C. Teak and pine
• D. Deodar and fern

Answer 1

The correct option is C Teak and pine

Secondary growth is the increase in diameter or thickness due to the formation of secondary tissue, as a result of the activity of vascular cambium and cork cambium.
Secondary growth is a characteristic feature of dicot stem and root and gymnosperms. Teak is a dicot and pine is a gymnosperm. Therefore, these are the best examples to study secondary growth.
Secondary growth is not observed in pteridophytes and rarely observed in monocots. Wheat and sugarcane are monocots while ferns are pteridophytes.