In an experiment involving treatments to demonstrate transpiration, six experimental setups were as follows:
I. Woody plant with only leaves coated with Vaseline jelly.
II. Woody plant with only stem coated with Vaseline jelly
III. Woody plant without any coating of Vaseline jelly
IV. Herbaceous plant with only stem coated with Vaseline jelly
V. Herbaceous plant with only leaf coated with Vaseline jelly
VI. Herbaceous plant without any coating of Vaseline jelly
Cobalt chloride (COCl2) paper (changes from blue to pink when wet) was attached to the leaves and stem.
The plants were cell watered and kept under adequate sunlight. The following were proposed :
Which of the above is/are correct ?
(a) I, II and V
(b) Only II
(c) III, IV and VI
(d) Only V
