Question

Hi GUYS PLZ SEND ME NOTES OF CHAPTER CELL THE FUNDAMENTAL UNIT OF LIFE FOR CLASS 9. WHO WILL SEND ME PROPER NOTES HE WILL BE MARKED AS BRAINLIST

Answer 1

• Introduction
• The cell theory
→ Types of organisms
→ Types of cells
• Difference between Animal cell and Plant cell
• Diffusion
• Osmosis
• Hypotonic or Hypertonic or Isotonic solution
• Plasma membrane or Cell membrane
→ Properties of Plasma membrane
→ Functions of Plasma membrane
• Cell Wall
→ Function of Cell Wall
• Plasmolysis
• Nucleus
→ Composition of Nucleus
→ Functions of Nucleus
• Nucleoid
• Cytoplasm
→ Function of Cytoplasm
• Endoplasmic Reticulum (ER)
→ Types of Endoplasmic Reticulum
→ Functions of Endoplasmic Reticulum
• Golgi Apparatus
→ Function of Golgi Body
• Lysosomes
→ Functions of Lysosomes
• Mitochondria
→ Structure of mitochondria
→ Functions of mitochondria
• Plastids
→ Structure of Plastids
→ Function of Plastids
• Vacuoles
→ Functions of vacuoles


→ Types of organisms

• On the basis of no. of cells, organisms are of two types:
(i) Unicellular Organism
(ii) Multicellular Organism

(i) Unicellular Organism: These organisms are single celled which perform all the functions. Example: Amoeba, paramecium, bacteria.

(ii) Multicellular Organism: Many cells grouped together to perform different function in the body  and also form various body parts. Example: fungi, plants, animals.


Cell Wall

• Cell wall is another rigid outer covering in addition to the plasma membrane found in plant cell. The cell wall lies outside the plasma membrane.

• The plant cell wall is mainly composed of cellulose. Cellulose is a complex substance which provides structural strength to plants.

→ Function of Cell Wall

• Cell walls permit the cells of plants, fungi and bacteria to withstand very dilute (hypotonic) external media without bursting.

Answer 2

Cell: Cell is called the fundamental unit of life.