Suggest an experiment to prove that a suitable temperature is necessary for germination.( seed structure and germination)

Experiment to show that optimum temperature is required for seed germination:
1. Take three beakers and label them as 1,2 and 3.
2. Place some cotton wool in each of the three beakers.
3. Wet the cotton wool and place equal no of gram seeds over the cotton wool.
4. Now keep the beaker 1 at an ordinary temperature, beaker 2 in refrigerator and beaker 3 in an oven.
5. Observe the three beakers after 2-3 days.
6. The gram seeds in beaker 1 will germinate while the seeds present in beaker 2 and 3 will not germinate. This shows that requisite temperature is required for the seeds to germinate.

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