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प्रश्न
Given alongside is the diagram of an experimental set-up to demonstrate a certain phenomenon in plants.
What is the purpose of putting oil in the test tube?
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उत्तर
Oil is put on the surface of water to prevent loss of water by evaporation.
संबंधित प्रश्न
Define the termTranspiration
Given below is a diagrammatic sketch (surface view) of a stomatal apparatus from a dicot leaf.
(a) Label the parts numbers 1-3
(b) Is this state, open or closed?
(c) Is this stoma, of a dicot leaf or a monocot leaf?
(d) Redraw a sketch of the stomatal apparatus in the state opposite to the one shown here.
Give a reason.
What happens to the movement of the air-bubble if the apparatus shown above is kept in front of a fan?
An apparatus as shown below was set up to investigate a physiological process in plants. The setup was kept in sunlight for two hours. Droplets of water were then seen inside the bell jar. Answer the questions that follow:
Suggest a suitable control for this experiment.
An apparatus as shown below was set up to investigate a physiological process in plants. The setup was kept in sunlight for two hours. Droplets of water were then seen inside the bell jar. Answer the questions that follow:
Mention two ways in which this process is beneficial to plants.
Design an experiment to demonstrate the transpiration process.
Plants lose water by the process of transpiration.
Guard cells are responsible for the opening and closing of stomata.
Complete the following by choosing the proper option.
Stomata : Transpiration :: Hydathode : ____________.
Why is transpiration less in the still wind?
