Maximum transpiration in plant takes place from

1. stomata
2. cuticles
3. lenticels
4. root hairs

Injury to the medulla generally results in death. Which of the following reasons support this statement?

P. It controls the activities of the internal organs.

Q. It control involuntary actions like salivation, vomiting, movement of breathing, beating of the heart.

R. It is the main thinking part of the brain.

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

After coming from school, Rita wants to watch some programme on TV. She switch it on and press the remote for a particular channel.

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

(a) Cerebrum
(b) Cerebellum
(c) Skeletal muscles
(d) Medulla oblongata

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

Name the following.

(a) General name of chemical substances which bring about control and coordination in plants.

(b) The kind of lens required to correct myopia.

(c) The prime source of chlorofluorocarbon is

(d) The chromatin material is formed of

(e) A pollutant which is mainly responsible for causing acid rain.