The rate of comparison of transpiration from both surfaces of a dorsiventral leaf is measured using

1. Ganong's potometer
2. Darwin's potometer
3. Garreau's potometer
4. Farmer's potometer

X-ray machine operator have to take special care to avoid exposure of X-rays.

Which of the following reasons support this statement?

P. X-ray damage the body cells.
Q. Too frequent exposure may cause genetic variations, bone cancer etc.
R. Too much X-rays exposure are not harmful.

1. Only P
2. Only Q
3. Only P and Q
4. Only Q and R

Harish was crossing the road when he suddenly slipped on a banana peel and fell on the road. After some time the inflamed region developed redness, swelling, pain with increased local heat.

Which of the following is/are involved in the process mentioned above?

(a) Leucocytes
(b) Erythrocytes
(c) Plasma
(d) Lymph

1. Only a
2. Only a and c
3. Only a, c and d
4. Only a, b and c

Name the following.

(a) The layer of the eyeball that consists of two types of photoreceptor cells known as rods and cones.

(b) The phenomenon of gradual increase in the average temperature of the surface of the Earth.

(c) Thin, double layered membranous structure enclosing an embryo.

(d) The molecule through which genetic information is transferred from one generation to other.

(e) The process of RBCs (Red Blood Corpuscles) formation.