Ssc Biology Chapter 2 Hand Note Exclusive
| Term | Definition | | :--- | :--- | | Cell | The structural & functional unit of life. | | Unicellular | Single-celled organism (e.g., Amoeba, Bacteria). | | Multicellular | Body made of many cells (e.g., Human, Mango tree). | | Tissue | Group of similar cells performing a specific function. | | Organ | Several tissues working together (e.g., Heart, Leaf). | | Cell Wall | Non-living, rigid outer layer of plant cells (made of Cellulose). | | Protoplasm | Living content of a cell = Cytoplasm + Nucleus. |
A cell consists of three main parts: Cell Membrane, Cytoplasm, and Nucleus. ssc biology chapter 2 hand note exclusive
Definition: A group of structurally similar cells performing a specific function together is called a tissue. Permanent Tissue:
Exclusive Hand Note
1. Meristematic Tissue (ভাজক টিস্যু): Actively dividing cells. Complex Permanent:
2. Permanent Tissue (স্থায়ী টিস্যু):