Question

(a) Leaves of a healthy potted plant were coated with vaseline. Will this plant remain healthy for long? Give reason for your answer.

(b) What will happen to the rate of photosynthesis in a plant under the following circumstances?
(i) cloudy day in morning but bright sunshine in the afternoon.
(ii) no rainfall in the area for a considerable time.
(iii) gathering of dust on the leaves.

Answer 1

hey here is ur answer

(a) no bcoz there will be no exchange of gases and transpiration which has no transportation of water

(b) Nthg will happen it will remain constant as there is sufficient sunlight as well as water
(2) the rate of photosynthesis will be decreased as there is no sufficient water and the plant who become weak
(3) the rate of photosynthesis decrease as the pores of stomata are blocked with dust as there will be no exchange of gases and transpiration does not take place

I hope this helps you

Answer 2

a) No this plant will not remain healthy for long. the plant will begin to die because:
• gaseous exchange will not takes places
•no absorption of CO2 hence no photosynthesis
•transpiration will not occur hence No transportation of water
b) rate of photosynthesis decreases
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