Question

Wid the help of an activity demonstrate geotropism in plant ?

Answer 1

Take a potted plant, and break the bottom part. Then keep it on its side.

You will notice that the roots of the plant go down towards the earth while the shoot grows away from the earth.

Hence roots are positively geotrophic and shoots are negatively geotrophic.

Answer 2

1) Soak some seeds of gram or moong in water for one day .
2) Pierce slightly big holes ( 2 mm diameter ) at the bottom of the cup .
3) Fill it with 1 cm thick layer of garden soil .
4) Sprinkled soaked seeds over the soil . water the seeds .
5) Put the cup on 2 pieces wooden or stone slabs so that there is little gap between the top of the table and bottom of cup .
6) Cover the lower part of set up with black paper .
7) Water the seeds regularly with little water .
8) You will observe that the roots come out of the holes and grow toward the earth showing positive geotropism.