Solved 2017 Question Paper ICSE Class 10 Biology — Question 5
Back to all questionsQuestion 4(a)
The diagrams given below represent the relationship between a mouse and a physiological process that occurs in green plants. Study the diagrams and answer the questions that follow: [5]
(i) Name the physiological process occurring in the green plant that has kept the mouse alive.
(ii) Explain the physiological process mentioned above.
(iii) Why did the mouse die in bell jar B?
(iv) What is the significance of the process as stated in (i) for life on earth.
(v) Represent the above mentioned physiological process in the form of a chemical equation.
(i) Photosynthesis occurring in the green plant that has kept the mouse alive.
(ii) Photosynthesis is the process by which living plant cells, containing chlorophyll produce food substances (glucose and starch), from carbon dioxide and water, by using light energy. Plants release Oxygen as a by-product during Photosynthesis.
(iii) Mouse died in bell jar B because the source of oxygen i.e., the green plant was missing and the oxygen present in the bell jar was utilized in burning of candle.
(iv) The significance of Photosynthesis for life on earth is:
- Provides food for all organisms
- Provides oxygen for respiration.
(v) Balanced chemical equation representing the process of photosynthesis is given below: