Short answerEasy0.5 marks
3(b)
The diagram of an apparatus given below demonstrates a particular process in plants. Study the same and answer the questions that follow: The diagram of an apparatus given below demonstrates a particular process in plants. Study the same and answer the questions that follow:
Which phenomenon is demonstrated by this apparatus?
Topic: Transpiration
Previous-year question practice database
Answer
Exam answer
TRANSPIRATION.
Explanation
Strictly the apparatus measures the UPTAKE of water, and that is taken as a measure of transpiration — a distinction the question in part (iv) goes on to explore.
The logic is that water lost from the leaves must be replaced from below, so the faster the shoot transpires, the faster it draws water up and the faster the air bubble travels along the capillary.
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