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:
What is the purpose of keeping the test tube B in the experimental set up?

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Solution

'B' acts as a control to prove that water is lost in the form of water vapour due to transpiration from the aerial parts/ leaves of the plant.

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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. 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.
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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.

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.
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