A watered potted plant is covered in a plastic bag. After a while, water droplets are seen on the inside of the bag. Which among the following is responsible for this observation in plants?

Reproduction

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Photosynthesis

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Transpiration

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Respiration

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Solution

The correct option is C Transpiration
The excess water absorbed by the roots of the plant is lost in the form of water vapour that is released through the stomata of the leaves. The water vapour condenses to form water droplets on the inside of the plastic bag. This property of plants is called transpiration. Whereas reproduction helps the plant to produce new offspring. Photosynthesis is the food-making process and respiration is the process of taking in air and using the oxygen present in it to break down food.

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Q. A well watered plant growing under sufficient sunlight was covered with the polythene and tied just above the roots. After 3 to 4 hours, it was observed that a lot water droplets were present inside the polythene bag. Which process may have contributed to this?

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.

Q. An apparatus as shown 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.

(i)

Name the process being studied.

(i i)

Explain the process named above in

(i)

(i i i)

Why was the pot covered with a plastic sheet?

(i v)

Suggest a suitable control for this experiment.

(v)

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

(v i)

List three adaptations in plants to reduce the above-mentioned process.

Water absorption through roots can be increased by keeping the potted plants :
(a) in the shade
(b) in dim light
(c) under the fan
(d) covered with a polythene bag

Water vapour evaporates from leaves. This process is called transpiration. This may be investigated by placing a plastic bag over the shoot of a plant as shown. Drops of a liquid appear on the inside of the bag. Cobalt chloride paper will be changed into ___________ colour if the drops of liquid are drops of water.

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