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diffusion

Outer membrane of Cell – Cell membrane / Plasma membrane

 Outer membrane of Cell [A] Cell membrane / Plasma membrane Position – This is the outer covering of the animal and plant cells which encloses the mass of cytoplasm and gives separate identity to the cell. Characteristics – (i) Selectively permeable so allow only selected substances to pass in (water, salt, oxygen) and out (carbon …

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What is Matter? What are the Characteristics of Matter?

Matter is everything around you which is made up of particles. It has mass and occupies space. Mass is a physical quantity which expresses the amount of stuff in an object. The space inside the container that is occupied by matter is its volume. Early Indian philosophers classified matter in the form of five basic elements – the …

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