Question

Secondary growth is best observed in

• A. Teak and Pine
• B. Deodar and Fern
• C. Wheat and Maiden Hair Fern
• D. Sugarcane and Sunflower

Answer 1

The correct option is A Teak and Pine

Increase in thickness or girth of the stem due to the formation of secondary tissues is called secondary growth. it occurs in dicotyledons and gymnosperms.

Teak (Tectona grandis)- it is dicotyledon growing tropical deciduous forests, exhibit secondary growth

Pine(Pinus sps.)- it is a gymnosperm, found in sub-tropical pine forests, exhibit secondary growth.

Deodar (Cedrus deodara)- it is gymnosperm, found in evergreen forests, exhibit secondary growth.

Fern(Pteris) - It is a pteridophyte, do not exhibit secondary growth

Wheat(Triticum vulgare) - it is a monocot, do not exhibit secondary growth

Maiden Hair Fern (Adiantum) - it is pteridophyte, do not exhibit secondary growth.

Sugarcane(Saccharum officinarum) - it is a monocot, do not exhibit secondary growth.

Sunflower(Helianthus annus) - it is dicotyledon, exhibit secondary growth.

So, the correct answer is 'Teak and Pine'