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A tumbler garden
Grow several kinds of seeds in 'tumbler gardens'. Every pupil might grow a tumbler garden of his own and keep a day by day pictorial record of the progress of the seedlings.
To make a tumbler garden cut a rectangular piece of blotter and fall it inside a drinking glass. Fill the centre of the glass with peat moss, cotton, excelsior, sawdust or some same material. Push a few seeds among the outside of the glass and the blotter. Keep a little water in the bottom of the glass.
Explain in detail about working of heart Heart has four chambers. Two upper chambers are called atria. Two muscular lower chambers are called ventricles. The right and left
Q. Do echinoderms have an excretory system? How is excretion done in these animals? Echinoderms do not have an excretory system their excretions are eliminated by diffusion.
how do carnivorous feed
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