9th Class Biology
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ANIMAL TISSUES
What are Animal Tissues? Animal tissues are groups of similar cells that work together to perform…
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PLANT TISSUES
What are Plant Tissues? Plant tissues are groups of similar cells that work together to perform…
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TISSUES
Introduction All living organisms are made up of tiny building blocks called cells. A single cell…
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CELL DIVISION
What is Cell Division? Cell division is the process by which new cells are formed Growth…
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CELL ORGANELLES
What are Cell Organelles? Cells have small structures inside them called organelles Each organelle has a…
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What is a Cell Made Up of?
Structural Organisation of a Cell When we observe a cell under a microscope, we usually see…
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Cell Shape, Size & Function
Observation of Different Cells We can prepare temporary mounts of: Leaf peel Onion peel (different sizes)…
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Discovery of the Cell
In 1665, Robert Hooke observed a thin slice of cork under a self-designed microscope. He saw…
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The Fundamental Unit of Life: The Cell
Introduction: All living organisms—plants, animals, and humans—are made up of tiny units called cells. The cell…
