Question

a) name the process intended for study.

b)define the above-mentioned
processes.

c)when the weight of the test tubes a and b are taken before and after the experiment what changes observed justify?

d)what is the purpose of keeping the test tube baby in the experimental setup?

e)what is the purpose of putting oil in the test tube? ​

Answer 1

(i) The process that intended for study by this experiment is transpiration.

(ii) Transpiration is the process in which water is lost in the form of vapour from the aerial parts of the plant.  

(iii) After the experiment, we observe test tube A is raised up i.e., a loss of weight. In test tube B, the weight remains unchanged.

Reason : In test tube A, loses weight due to the plant transpires and loses water. In B there is no plant so there is no transpiration and the oil on the surface prevents direct evaporation and so weight remains unchanged.  

(iv) As a control experiment.

Answer 2

i) The process that intended for study by this experiment is transpiration. (ii) Transpiration is the process in which water is lost in the form of vapour from the aerial parts of the plant. ... Reason : In test tube A, loses weight due to the plant transpires and loses water.