Question

Given below is a group of five terms. Arrange and rewrite the terms in correct order so as to be in a logical sequence.

Spongy cells, upper epidermis, stoma, palisade tissue, substomatal space.

Answer 1

The correct order of cells from the outer towards to the inner region of the leaf are as follows: Upper epidermis, palisade tissue, spongy cells, substomatal space, and stoma.

Upper epidermis:

1. It is usually made up of a single layer of cells and is covered by a thick layer of cuticles.
2. It also has some small openings known as stomata.

Palisade tissue:

1. They are elongated cylindrical cells that are arranged in a single layer below the upper epidermis.
2. They are closely packed and contain an abundant number of chloroplasts.

Spongy cells:

1. They are irregularly shaped parenchyma cells that have large intercellular spaces and air voids between them.
2. They have fewer chloroplasts and help in the diffusion of gases.

Substomatal space:

1. It is a cavity located in immediate proximity to the stoma.
2. It helps in the rapid diffusion and exchange of gases.

Stoma:

They are openings in plant leaves that regulate the exchange of carbon dioxide and oxygen..