Question

vestigate the conditions required for seeds to germinate. Set up your
apparatus as shown in figure. Keep the dishes at room temperature for a week.
Explain your observations.
Soaked peas/seed in dry cotton wool, Soaked peas/seed in wet cotton wool, Soaked peas/seed covered with water,
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Answer 1

Answer:

Aim: To prove that oxygen is necessary for germination.

Apparatus: Two conical flask marked A and B, seeds of pea, water, cotton wool, pyrogallic acid, test tubes.

Procedure: Take two conical flask with a cork and mark them A and B respectively.Place a wet cotton wool in each flask with some soaked Pea seeds. Pyrogallic acid absorbs oxygen so a test tube of in flask B in such a way that the cemical dosent drop in the flask. In flask A hang a test tube of plain water.

Observation: The seeds in flask A germinate because of presence of oxygen and seeds in flask B do not germinate because pyrogallic acid absorbs oxygen.

Result: Oxygen is necessary for germination.