Design an experiment to demonstrate hydrotropism.

solution:

Aim : To demonstrate that root shows hydrotropism.

Method Place germinating seeds in moist saw dust contained in a sieve.

Observation

(i) The radicles pass down and come out of the sieve pores under the influence of gravity.

(ii) After some growth, radicles move back and enter the saw dust again.

(i) This shows that roots shows both hydrotropic response and geotropic response.

(ii) The hydrotropic response of root are stronger than geotropic response.