The given figure represents an experiment performed to demonstrate certain phenomenon in plants. The set-up was kept in sunlight for about two hours. [5 MARKS]

(a) What is the aim of the experiment?
(b) Define the process mentioned in (a) above.
(c) What do you observe in the experiment as an evidence of the process stated in (a) and (b) above?
(d) What precautions are taken for obtaining proper results in the experiment?
(e) Suggest a suitable experiment for comparison.

Open in App

Solution

Each Part: 1 Mark

(a) The aim of the experiment is to show transpiration.
(b) Transpiration is the loss of water in the form of water vapour from the aerial parts of the plant.
(c) The inner surface of the polythene bag demonstrates the presence of water droplets which proves that water is lost during transpiration.
(d) (i) The apparatus should not be kept in a very hot place as the water vapour will not be able to condense.
(ii) The polythene bag should be airtight to prevent the entry of water vapour from outside.
(e) Control Experiment: Put a known weight of calcium chloride (water-absorbing substance) inside the polythene bag in the above experiment. The gain in the weight of calcium chloride shows that water is lost from the leaves during transpiration.

Suggest Corrections

Similar questions

Q. The figure given below represents an experimental set up with a weighing machine to demonstrate a particular process in plants. The experimental set up was placed in bright sunlight. Study the diagram and answer the following questions :
(i) Name the process intended for study.
(ii) Define the above mentioned process.
(iii) When the weight of the test tube (A & B) is taken before and after the experiment, what is observed ? Give reasons to justify your observation in A &B.
(iv) What is the purpose of keeping the test tube 'B in the experimental set up ?

The figure given below represents an experimental set up with a weighing machine to demonstrate a particular process in plants. The experimental set up was placed in bright sunlight. Study the diagram and answer the following questions :

(a) Name the process intended for study.

(b) Define the above mentioned process.

(c) When the weight of the test tubes A and B is taken before and after the experiment, what change is observed ? Justify.

(d) What is the purpose of keeping the test tube B in the experimental set up ?

Q. Given below is an experimental set-up to demonstrate a particular process. Study the same and answer the questions that follow: [5 MARKS]

(a) Name the physiological process being studied.
(b) Explain the process mentioned above.
(c) What is the aim of the above experiment?
(d) What would you observe in the experimental set-up after an hour? Give reason to support your answer.
(e) Mention any three adaptations found in plants to overcome the physiological process mentioned in (a) above.

Q. The figure given below represents an experimental set-up with a weighing machine to demonstrarte a particular process in plants. The experimental set-up was placed in bright sunlight. Study the diagram and answer the following questions: [5 MARKS]

(a) Name the process intended for study.
(b) Define the above-mentioned process.
(c) When the weight of the test tube (A and B) is taken before and after the experiment, what is observed? Give reasons to justify your observation in A and B.
(d) What is the purpose of keeping the test tube B in the experimental set-up?

Q. The figure given below represents experimental set up with a weighing machine to demonstrate a particular process in plants. The experimental set up was placed in bright sunlight. Study the diagram and answer the following questions:
Define the above mentioned process.

Join BYJU'S Learning Program