Adjusting the focal length of the eye lens to view objects at different distances is done by:

1. Cornea
2. Iris
3. Ciliary muscles
4. Sclera

Four friends P, Q, R and S were discussing the examples of genetic disorders. The examples they quoted were as follows:

P. Colour blindness and Malaria

Q. Albinism and Cholera

R. Haemophilia and Colour blindness

S. Haemophilia and Albinism

Who gave the correct examples?

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

A male gorilla has 48 chromosomes in each of its body cells. How many chromosomes will each of the sperms have?

1. 24
2. 48
3. 12
4. 16

Assertion (A): Sympathetic nervous system prepares the body for violent action against abnormal conditions.

Reason (R): Sympathetic nervous system accelerates heartbeat.

Which of the following is correct?

1. Both A and R are True
2. A is True, R is False
3. A is False but R is True
4. Both A and R are False