Reva carried out an experiment, she took a watered potted plant and placed it on a sheet of glass and covered it with a bell jar. The edge of the bell jar is sealed with vaseline to make it airtight.The whole apparatus is then placed in a sunny place for an hour or two.After a couple of hours, she observed that the inner walls of the bell jar get accumulated with drops of moisture.What does this signify?

The plants get rid of the excess water in the form of water vapour through the leaves.

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This shows the process of transpiration in plants.

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Both a and b

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None of the above

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Solution

The correct option is C
Both a and b

The experiment mentioned above shows that the plants get rid of the excess of water in the form of vapour through the leaves.The process of loss of water in the form of water vapour from the aerial parts of a plant is termed as transpiration.

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Reva carried out an experiment, she took a watered potted plant and placed it on a sheet of glass and covered it with a bell jar. The edge of the bell jar is sealed with vaseline to make it airtight.The whole apparatus is then placed in a sunny place for an hour or two.What are the observations made by Reva at the end of this experiment?

Preeti carried out an experiment. She took two transparent plastic jars and labeled them as A and B. She placed one cockroach in each of the jars. She covered jar A with a mosquito net and jar B with a polythene sheet. What will be her observation after a few hours?

Rita carried out an experiment, she took two transparent plastic jars and labeled them as Jar 1 and Jar 2. In Jar 1 she placed a cockroach, pieces of bread and water. In Jar 2 she placed a cockroach, pieces of bread but no water. She then covered both the jars with a mosquito net. What will be her observations after a few days?

Q. 0bserve the picture of an activity carried out with leaves of plants and bell jar.

Now answer the following.
(a) Which process is demonstrated in the activity?
(b) When will this activity show better results on a bright sunny day or a cloudy day?
(c) What will you observe in the bell jar after a few hours of setting up the activity?
(d) Mention any one precaution you must take while performing this activity.

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 :

(a) Name the process being studied.

(b) Explain the process named above in (a) .

(d) Suggest a suitable control for this experiment.

(e) Mention two ways in which this process is beneficial to plants.

(f) List three adaptations in plants to reduce the above mentioned process.

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The correct option is C Both a and b The experiment mentioned above shows that the plants get rid of the excess of water in the form of vapour through the leaves.The process of loss of water in the form of water vapour from the aerial parts of a plant is termed as transpiration.

The correct option is C
Both a and b

The experiment mentioned above shows that the plants get rid of the excess of water in the form of vapour through the leaves.The process of loss of water in the form of water vapour from the aerial parts of a plant is termed as transpiration.