Question

Select the correct pair.

• A. Large colorless empty cells in the epidermis of grass leaves - Subsidiary cells
• B. In dicot leaves, vascular bundles are surrounded by large thick-walled cells - Conjunctive tissue
• C. Cells of medullary rays that form part of cambial ring - Interfascicular cambium
• D. Loose parenchyma cells rupturing the epidermis and forming a lens-shaped opening in bark- Spongy parenchyma

Answer 1

The Correct Option is C

The question is to select the correct pair from the given options related to plant biology. Let's analyze each of the given pairs:

1. Large colorless empty cells in the epidermis of grass leaves - Subsidiary cells:

   In grass leaves, the large colorless empty cells are bulliform cells, not subsidiary cells. Bulliform cells help in the folding and unfolding of leaves. Subsidiary cells are associated with guard cells in the stomatal complex.

2. In dicot leaves, vascular bundles are surrounded by large thick-walled cells - Conjunctive tissue:

   The cells surrounding the vascular bundles in dicot leaves are generally bundle sheath cells, not conjunctive tissue. Conjunctive tissue refers to tissue connecting vascular bundles in roots.

3. Cells of medullary rays that form part of the cambial ring - Interfascicular cambium:

   This is the correct pair. The interfascicular cambium, arising from the cells of medullary rays in woody plants, contributes to the formation of the vascular cambium, a part of the cambial ring.

4. Loose parenchyma cells rupturing the epidermis and forming a lens-shaped opening in bark - Spongy parenchyma:

   The term spongy parenchyma refers to the tissue in leaves, part of the mesophyll. The description in the option refers to lenticels, which form through loose parenchyma cells rupturing the epidermis in the bark to facilitate gas exchange.

Hence, the correct pair is Cells of medullary rays that form part of the cambial ring - Interfascicular cambium.