Draw the experimental set-up of geotropic movement and label it

Question

Draw the experimental set-up of geotropic movement and label it. 

Answer

Experiment geotropism

1. Materials required: A few germinating seeds, and a moist substance (moist cotton).
2. Procedure:
   • Place the germinating seeds in a horizontal position over the moist substance (moist cotton).
   • Keep the setup in a dark chamber to avoid the influence of light.
3. Observation:

• • After some days, the tip of the radicle (the embryonic root) will bend downwards, showing positive geotropism of the root.
  • The plumule (the embryonic shoot) moves in a direction vertically upwards, showing negative geotropism of the stem.

Inference:

• • Stem bending away from the gravitational pull shows negative geotropism, whereas, the root shows positive geotropism by moving towards the external stimulus.
  • The movement of roots and stems in response to gravity is essential for plants to grow upright and absorb nutrients and water from the soil.