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Explain Saliva - External Defence Mechanism
Saliva contains microorganisms which are not the normal inhabitants. Dead microbes are passively flushed by the saliva and are swallowed.
Illustrate about the Soil Water Water, as you are well aware, is the most common substance on earth which is essential for life. Plants require water continually to satisfy t
Explain the Histotoxic Hypoxia It is a type of hypoxia in which due to the action of a toxic agent oxidative enzymes are poisoned hence the tissue cells cannot utilize oxygen s
Explain Control of Our Heart through Nerves When we exercise in the mornings, the heart beats faster and when we sleep at night, it slows down. Have you ever wondered how does
To show how water rises by capillarity Colour some water in a shallow dish with ink and touch a blotter to the water surface. Observe how the water increases in the blotter.
define carbohydrates.give a brief account on classification of carbohydrates.
Safety spectacles : Safety spectacles need to be used where there is the slightest risk of splashes of chemicals or fragments of dust, glass, etc. getting into the eyes.
factors which decide the broad area of scientic activity
A simple mercury barometer Seal single end of a glass tube about 80 cm in length by rotating it in a gas flame. The tube should be held as almost vertical as possible. Join a s
The buoyancy of water Find a metal can like a coffee can or a cigarette tin which has a tightly fitting cover. With the cover on, push the can into a pail of water, cover end d
State about the Peaty soils Peaty soils occur in humid regions and have an accumulation of high organic matter. Such peaty soils containing considerable amount of soluble salt
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