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Question
Give Reasons for the following:
Young plants wilt on a hot sunny day.
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Solution
On a hot sunny day, the rate of transpiration exceeds the rate of water absorption by roots. As a result of this leaves collapse and plant wilts.
RELATED QUESTIONS
Given below is an apparatus which was setup to investigate a physiological process in plants. The setup was placed in bright sunlight. Answer the questions that follow:
- Name the process being studied. Define the process.
- Why was the pot enclosed in a rubber sheet?
- Mention two external factors which can accelerate the above process.
- List two adaptations in plants to reduce the above process.
- Draw a neat, labelled diagram of a stomatal apparatus.
Answer the following (only in few words);
In which form, water comes out in transpiration?
From which structure cuticular transpiration occur in plants?
Choose the correct answer:
Transpiration is more ____________
Choose the correct answer:
In herbaceous plants, following percentage of absorbed water comes out __________
The figure given below represents an experimental setup with a weighing machine to demonstrate a particular process in plants. The experimental setup was placed in bright sunlight. Study the diagram and answer the following questions.
When the weight of the test tubes A and B is taken before and after the experiment, what change is observed? Justify.
Differentiate Between Transpiration and Evaporation.
State the Location:
Hydathodes
Mark the most appropriate answer in the following:
In hot summer days, plant cooling is due to :
