Question

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

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

Answer 1

The correct option is C

Teak and pine

The correct option is C.

Explanation of the correct option:

1. In Dicots and gymnosperms, secondary growth is observed.
2. Secondary growth increases the lateral girth of the stem.
3. So, secondary growth observed in teak and pine is best suitable.
4. Teak is a dicotyledon that shows secondary growth.
5. Pines are gymnosperms and dicots, it will also show secondary growth.

Explanation of the incorrect option:

Option A:

1. As sugarcane is a monocot plant so no secondary growth is observed.
2. But sunflower is a dicot plant that observes secondary growth.

Option B:

1. Teak is dicotyledon and will show secondary growth.
2. Pine is neither monocot nor dicot but are conifers so it does not show secondary growth.

Option D:

1. Wheat is monocot it does not show secondary growth.
2. Maidenhair fern is a pteridophyte and cannot show secondary growth.

Final answer: For a critical study of secondary growth in plants the pair of teak and pine should be suitable.