Question

The air spaces in the leaf is created by
A. Chlorenchyma
B. Aerenchyma
C. Palisade parenchyma
D. None of the above

Answer 1

Hint: There are different types of cells in the plants. They will help them in different ways. The leaves are the most important cells are those which help them in the photosynthesis. Some help them to gain buoyancy and protection against shock treatment. They form a layer of cells in the leaves.

Step by step answer:Mesophyll is of two types- palisade and spongy. These leaves will have palisade parenchyma on both of its sides. Both sides are the upper epidermis and lower epidermis. The epidermis is the outer cell layer of the plant cell.
-The spongy mesophyll has various cells like aerenchyma, chlorenchyma, etc. to make the functioning easier for the photosynthesis.
-Aerenchyma cells provide resistance for an internal pathway of exchange of gases in plants above the water and their tissue cells.
Option A: Chlorenchyma: The parenchyma cells having chloroplasts in them are chlorenchyma cells. They can perform photosynthesis. They make up the mesophyll tissue of the plant.
Option B: Aerenchyma: The tissue having air spaces between cells of stem and roots are called aerenchyma cells. This will help in the exchange of gases and also provide buoyancy to plants in water.
Option C: Palisade parenchyma: The palisade parenchymatic cells are cylindrical shapes, with a large number of chlorophylls in them.
Hence, the answer is option B: Aerenchyma

Note: When there is hypoxia condition in the roots, the intake of oxygen becomes fast thus the diffusion occurs very quickly. This happens in the wetlands. So, the plants present there have aerenchyma cells for the diffusion to be easier and at a higher rate.