MCQ’s
Long Questions
Short Questions
Chapter 4 of Class 9 Biology, titled Cells and Tissues, provides an introduction to the basic structural and functional units of life—cells—and the organization of these cells into tissues. It explains how all living organisms are made up of cells, which perform vital functions necessary for survival.
The chapter covers the following general topics:
- Cells: The chapter introduces the cell as the fundamental unit of life, discussing its structure, types (prokaryotic and eukaryotic), and various organelles like the nucleus, mitochondria, and cell membrane, each of which performs specific functions within the cell.
- Tissues: After covering cells, the chapter moves on to tissues, which are groups of similar cells that work together to perform a specific function. In animals, these include types like epithelial tissue, connective tissue, muscle tissue, and nervous tissue, while plants have different tissues such as meristematic and permanent tissues.
This chapter helps students understand the hierarchy of biological organization, starting from cells to tissues, and how these components contribute to the overall functioning of an organism.