Correct and rewrite the statement by changing the biological term that is underlined for each statement:

(i) The theory of Inheritance of Acquired Characters was proposed by Watson and Crick.

(ii) The protective sac which develops around the developing embryo is called the Pericardium.

(iii) Maintaining balance of the body and coordinating muscular activities is carried out by the cerebrum.

(iv) The kidney is composed of a number of neurons.

(v) The part of the eye which can be donated from a clinically dead person is the Retina.

Give suitable biological reasons for the following statements :

(i) The birth rate in India is very high.

(ii) Carbon monoxide is dangerous when inhaled.

(iii) Root hairs become flaccid and droop when excess fertilizers are added to the moist soil around them.

(iv) Acid rain is harmful to the environment.

(v) All life on Earth is supported by Photosynthesis.

While recording the pulse rate, where exactly does a doctor press on our wrist?

1. Nerve
2. Vein
3. Artery
4. Capillary

In a human male, a sperm will contain:

1. Both X and Y chromosomes
2. Only Y Chromosomes
3. Only X chromosome
4. Either X or Y Chromosomes