Ways to avoid dieseases : Boiling Water before drinking (10-15 min), Food and Water should be covered , insecticides , Disinfectants, personal hygiene , How birds fly : hollow bones , Streamed line body shaped , forelimbs modified as wings , Types of animals : Herbivores, Carnivores , Rodent , omnivores, scavengers , Movable Joints : Ball and socket , pivot , gliding , hinge , Immovable Joints : skull , ribs to sternum. ,

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