Simple Tissues

Simple tissues are a type of plant tissue that is composed of cells that have similar structure and function. These tissues are responsible for carrying out various functions like photosynthesis, storage, and support in plants. There are three types of simple tissues: parenchyma, collenchyma, and sclerenchyma.

Explanation:

Parenchyma:
Parenchyma is the simplest type of plant tissue. It is made up of living cells with thin cell walls. These cells are loosely packed and have large intercellular spaces. Parenchyma cells are involved in photosynthesis, storage of food, and gas exchange. They are found in various parts of the plant, including the leaves, stems, and roots.

Collenchyma:
Collenchyma is another type of simple tissue. It consists of living cells with irregularly thickened cell walls. These walls provide support and flexibility to the plant. Collenchyma cells are elongated and often found in the outer layers of stems and leaves. They provide mechanical support to growing plant parts.

Sclerenchyma:
Sclerenchyma is the third type of simple tissue. It is composed of cells with thick, lignified cell walls. These cells are dead at maturity and provide mechanical support to the plant. Sclerenchyma cells are rigid and have a narrow lumen. They are found in various plant parts, including the stem, leaves, and fruits.

Explanation of the Correct Answer:
The correct answer is option A, which comprises only simple tissues: parenchyma, collenchyma, and sclerenchyma. Xylem and phloem are complex tissues that are involved in the transportation of water, minerals, and food in plants. They are not considered simple tissues.

To summarize, simple tissues are composed of cells with similar structure and function. They include parenchyma, collenchyma, and sclerenchyma. These tissues play important roles in plant growth, support, and storage.