Question

7. 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 :
(2015)
WATER DROPLETS
BELL JAR
COVERED
POTTED PLANT
(a) Name the process being studied.
(b) Explain the process named above in (a).
(c) Why was the pot covered with a plastic sheet?
(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.​

Answer 1

Answer:

1. transpiration
2. It is loss to water in form of water vapour s from Ariel parts of leaves
3. to water vapour to escape
4. held in cooling , results in rainfall
5. sunken stomata,less leaves thick cuticleetc

Answer 2

Answer:

(a) The process being studied is Transpiration.

(b) Transpiration is the process by which plants lose water in the form of  evaporation from aerial parts such as leaves, stems and flowers which helps in cooling.

(c) The pot was covered with a plastic sheet in order to trap the water droplets which would have instead escaped out in the process of transpiration.

(d) A suitable control for the experiment would be an uncovered potted plant.

(e) Any 2 ways are:-

~helps in cooling during a hot summer day.

~helps in ecange of gases

(f) Any 3 adaptations in plants to reduce transpiration are:-

~Leaves reduced to spines (Reduces the surface area for transpiration)

~Reduced number of stomata (Reduces the transpiration rate )

~Waxy leaf cuticle (Impermeable to water, which stops evaporation)

Explanation:

Explained in the answer itself. I've provided the exact answers with brief elaboration.