Question

Describe an experiment to demonstrate geotropism in plants.

Answer 1

With the help of an activity demonstrate geotropism in plants


Soak some seeds of gram or moong in water for one day.

Pierce slightly big holes (2 mm diameter) at the bottom of the cup.

Fill it with 1cm thick layer of garden soil.

Sprinkle soaked seeds (moong/gram) over the soil. Water the seeds.

Put the cup on 2 pieces of wooden or stone slabs so that there is a litde gap between the top of the table and bottom of the cup. Cover the lower part of the set-up with black paper.

Water the seeds regularly with little water.

You will observe that the roots come out from the holes and grow towards the Earth showing positive geotropism.

Answer 2

$\textbf{Step 1}$:

Soak few seeds of moong in water for about a day.

$\textbf{Step 2}$:

Cut out two big holes from the bottom of the cup or container.

$\textbf{Step 3}$:

Add soil to it about 1cm.

$\textbf{Step 4}$:

Sprinkle the soaked seeds over the soil and water the seeds.

$\textbf{Step 5}$:

Put the container or cup on wood slabs.

$\textbf{Step 6}$:

Cover the part of the set up with a dark coloured paper.

$\textbf{Step 7}$:

Water the seeds regularly.

$\textbf{Step 8}$:

Observe the setup. You will observe that the roots came out from the holes and is growing towards the Earth showing geotropism.