Shruti’s mother gave birth to two male babies. Both the babies had a strong resemblance to each other. The doctor said that they have been formed from a single ovum.

(a) What kind of twins are they?

(b) Why are they of the same gender?

State the effect of Adrenaline on:

(a) Pupils of eyes

(b) Heartbeat

Mention the significance of the Testes being located inside the scrotum.

Give two examples of natural resources which cannot keep pace with the rising population.