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A self-starting siphon
Secure a piece of glass or plastic tube about 2.5 cm in diameter and 8 to 10 cm in length. Fit single end with a one-hole stopper, carrying a short length of glass tube that extends about a centimetre under the stopper on the inner side. Fit the other end of the large tube with a two-hole stopper. By one of the holes in the two-hole stopper place a jet tube which extends up by the larger tube and into the opening of the glass tube in the one-hole stopper. Connect a long rubber tube to the glass tube in the single-hole stopper
Explain Gut secretions - External Defence Mechanism From the saliva and respiratory tract, bacteria reach the gut, here they are killed by the hydrochloric acid and proteolytic
Explain Light source - Pre-requisites of Colour Perception No colour may be detected by the eyes or by an instrument in the dark i.e. in the absence of a light source emitti
characteristics ot coelenterata
summary on parts of the reproductive system
Ecological Crises: The natural atmosphere which man has inherited from the past, with healthy and fresh air, shielding from excessive radiation of the sun, has been deteriorat
Explain Functions of Gastric Juice - Enzyme action Enzyme action: Pepsin begins the chemical digestion of proteins. It converts proteins to peptones. The enzyme rennin present
facts
Heaping water up in a glass Place a drinking glass in a shallow pan or on a saucer. Rub the top edge of the glass with a dry cloth. Pour water into the glass unless it is full
When, in the geologic column, did dinosaurs become extinct at the Cretaceous-Tertiary boundary
How can we know the parent material of soils?
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