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ICSE Class 9 Answered

The given diagram refers to an apparatus which is used to demonstrate a physiological process. (1) Why is potassium hydroxide solution kept in test tube X and Y? (2) Why are boiled peas soaked in disinfectant kept in test tube Y? (3) Why has coloured water risen in tubing 1? (4) Name the biological process which causes coloured water to rise in tubing 1. (5) Define the biological process explained through the given experiment.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
answered-by-expert Expert Answer

(1)Potassium hydroxide solution has been kept in test tube X and Y to absorb CO2 produced during respiration.

(2) Boiled peas soaked in disinfectant are kept in test tube Y because if these are not soaked in disinfectant, bacterial growth may be there in the tube Y and we will not get results due to bacterial respiration.

(3) The germinating peas respire and oxygen is used, which creates vacuum in the tube. So, coloured water rises in tubing 1.

(4) Respiration

(5) Respiration is the step-wise oxidation of glucose in living cells to release energy.

Answered by | 04 Jun, 2014, 03:23: PM

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