Class 9 bio ch 2 ncert based exam paper

Here’s the description for Chapter 2 – Tissues (Biology, Class 9) focusing on Plant Tissues: --- Tissues – Description (Plant Tissues) A tissue is a group of cells that are similar in structure and work together to perform a specific function. In plants, tissues are of two main types: Meristematic and Permanent. 1. Meristematic Tissues These are actively dividing tissues found in specific growing regions of plants. They help in the growth of plants. Apical Meristem – at root and shoot tips; increase length. Intercalary Meristem – at nodes; increase length of internodes. Lateral Meristem – in cambium; increase girth (thickness). 2. Permanent Tissues These are formed when meristematic tissues lose the ability to divide and become specialized for specific functions. Simple Permanent Tissues – made of one type of cell. Parenchyma – thin walls, storage and photosynthesis. Collenchyma – thickened corners, provides flexibility and support. Sclerenchyma – thick, lignified walls, provides hardness and strength. Complex Permanent Tissues – made of different types of cells working together. Xylem – transports water and minerals. Phloem – transports food. Importance –