How is the study of cells and tissues significant for understanding the life. Class 9

How is the study of cells and tissues significant for understanding the life. Class 9

Think It Over (Page 28)

Question 1.

How is the study of cells and tissues significant for understanding the life processes and human welfare? Class 9

Answer:

The study of cells and tissues is important because cells are the basic units of life and in multicellular organisms they group together to form tissues that perform specific functions. This division of labour makes life processes more efficient, as different tissues carry out different activities such as movement, transport, and coordination. By studying cells and tissues, we understand how the body is organized and how various functions are performed, which helps in understanding life processes and contributes to human welfare.

Question 2.

How are tissues in plants and animals different, and why? Class 9

Answer:

Plant and animal tissues differ because their functions and lifestyles are different.

Plants are fixed in one place, so their tissues provide support and strength. Their cells have a rigid cell wall. Animals can move, so their tissues are flexible and do not have a cell wall.

Also, plants make their own food, so they have tissues for photosynthesis, while animals have tissues for digestion. These differences exist because plants and animals have different needs and ways of living.