Design an experiment to demonstrate hydrotropism.
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Following things are required for this experiment:
Seeds of bean, a deep tray, sand, a porous flower pot

Procedure:
The tray should be big enough to accommodate the porous pot.Fill the tray with sand and insert some seeds in it.Make a pit in the sand and insert the porous pot in it.Fill the porous pot with water.Leave the set up for about a week.
Observation:
After a week when seeds are taken out, it is observed that roots grow in the direction of the porous pot. This shows hydrotropic movement in roots.
Seeds of bean, a deep tray, sand, a porous flower pot

Procedure:
The tray should be big enough to accommodate the porous pot.Fill the tray with sand and insert some seeds in it.Make a pit in the sand and insert the porous pot in it.Fill the porous pot with water.Leave the set up for about a week.
Observation:
After a week when seeds are taken out, it is observed that roots grow in the direction of the porous pot. This shows hydrotropic movement in roots.
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Answer:
Take a tin box with hole at bottom. Fill it with moist saw dust. Sow some gram seeds in it. Keep the tin box in tilted position. When seeds start germinating, water the saw dust only in lower side of the tin box. You will observe that the radicle move towards the wet saw dust. This shows that root is positively hydrotropic.
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