Given below is the diagram of an experimental set-up:

a. What is the objective of this experiment?

b. Will it work satisfactorily? Given reason.

c. What alteration (s) will you make in it for obtaining expected result?

d. Would you take any step before starting the experiment? Describe this step and explain its necessity.

Draw a neat diagram of the stomatal apparatus found in the epidermis of leaves and label the Stoma, Guard cells, Chloroplast, Epidermal cells, Cell wall and Nucleus.

Given below is the diagram of an experimental set-up (final stage). Study the same and answer the following questions :

(a) What is the main aim of the experiment?

(b) Oxygen gas shown in the experiment is released from which of the raw materials ?

(c) How would you confirm the presence of oxygen gas?

(d) Name the chemical substance which can be added in water to enhance the process/rate of release of oxygen gas.

(e) Draw a neat and labelled diagram of the same experiment for its initial stage.

Given below are figures (A) and (B) showing open and closed stomatal apertures respectively.

Answer the questions that follow :

(a) When do these stomata open (day/night) ?

(b) What is the condition of the guard cells when the stomata are open (turgid/flaccid) ?

(c) Name the gas taken in and released out through these pores during photosynthesis.

(d) Name the cells of the lower epidermis that contain chloroplasts.

(e) Write two characteristic features of both the inner and outer walls of the guard cells.