In man, testes lie outside the abdomen. Give reason.

In man why testes are located outside the abdominal cavity in scrotum?

Explain the following: Why are the human testes located outside the abdominal cavity? Name the pouch in which they are present.

To a fish under water, the man appears as tall or small standing at the bank of a lake. Give reason.

Bell metal is an alloy. Give reasons.

Give three examples of sentences which are not statements. Give reasons for the answers.

Give three examples of sentences, which are not statements. Give reasons for your answers.

Constantin is an alloy. Give reason.

Why testes are lodged in the scrotum outside the body of male human beings?

A man is given a shock with 220 volt d.c. and thereafter with 220 volt (r.m.s.) a.c. will he feel the same intensity of shock in the two cases? Give reasons in support of your answer.