What is the purpose of keeping the test tube ...

ICSE Class X Biology 2014 Papers

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:

Question : 20 of 93

Marks: +1, -0

What is the purpose of keeping the test tube

B

in the experimental set up ?

Solution:

Test tube B acts as a control experiment where water is lost in the form of water vapour due to transpiration from the aerial parts.

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