Question

middle question of chapter the cell - it's structure and functions​

Answer 1

Answer:

Every organ in our body performs a variety of different functions such as digestion, assimilation, and absorption. Similarly, in the plants too, there are different organs of the plant which performs specialized or specific functions. For instance, the roots of the plants help in the absorption of minerals and water.

In our body and in the body of every living organism, every organ is composed of smaller parts known as tissues. A tissue is a group of like cells that perform a specific function.

Functions of a Cell

Structure and Support

we know a house is made of bricks. Similarly, an organism is made up of cells. Though there are certain cells such as collenchyma and sclerenchyma are present for offering structural support however in general too, all cells generally provide the structural basis of all organisms.

Growth

In complex organisms such as humans, the tissues grow by simple multiplication of cells. Hence, cells are responsible for the growth of the organism. The entire thing takes place via a process of mitosis.

Transport

Cells import the nutrients that are used in the different chemical process which take place inside them. As a result of these processes, a waste product is produced. Cells then work to get rid of this waste. In this manner, the small molecules like the such as oxygen, carbon dioxide, and ethanol pass through the cell membrane by diffusion. This method is known as passive transport. On the other hand, the larger molecules like the proteins and polysaccharides, go in and out of the cell via active transport.

Energy Production

Organisms need energy to perform different chemical reactions. In plants, the energy comes from the process of photosynthesis while in the animals the energy comes via respiration.

Metabolism

Cell is responsible for metabolism that includes all the chemical reactions that take place inside an organism to keep it alive.

Reproduction

A cell helps in reproduction by the processes of mitosis (in more evolved organisms) and meiosis.