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Animal

BST primary classes

Animal

Animals are living things which means they can perform the characteristics of living things which include reproduction, feeding, movement etc.  Animals cannot produce their own food themselves. They rely either directly or indirectly on the food produced by plant. Animals breathe in oxygen that is produced by plant. Examples of common animals:  butterfly, cat, cock, donkey, fish, goat, grasshopper, housefly, lizard, parrot, toad etc..   Features of common animals Size: Animals differ in their sizes. Some animals are big. Others are small. Body covering: The body of an animal has å type of covering. It could covered either with scales, feather, hair or shell Number of leg: Many common animals have legs. Some have two legs. Others have more than two legs.   Presentation Step I: Teacher revises the previous topic Step II: Teacher introduces the new topic “Animals ” Step III: Teacher lists and explains the features of an… Read More »Animal

Biology

WATER RELATIONS IN PLANT AND ANIMAL CELLS

WATER RELATIONS IN PLANT AND ANIMAL CELLS The medium (solution) surrounding cells or organisms is described by the terms hypotonic, hypertonic and isotonic. A solution whose solute concentration is more than that of the cell sap is said to be hypertonic A cell placed in such a solution loses water to the surroundings by osmosis A solution whose solute concentration is less than that of the cell sap is said to be hypotonic A cell placed in such solution gains water from the surroundings by osmosis A solution which has the same solute concentration as the cell sap is said to be isotonic When a cell is placed in such a solution there will be no net movement of water either into or out of the cell   Osmotic Pressure               The term osmotic pressure describes the tendency of the solution with a high solute concentration to draw water into itself… Read More »WATER RELATIONS IN PLANT AND ANIMAL CELLS

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