Mention whether the following statements are true (T) or false (F).

(a) Vasectomy is the surgical method of sterilisation in human males.

(b) Tubectomy is the placing of a diaphragm on the cervix.

(c) Cow was the first domesticated animal.

(d) Rapidly growing industries favoured population rise.

(e) Present human population growth is following arithmetic progression.

(f) Birth rate (natality) is the number of live births per hundred people of population per decade.

(g) Tubectomy is a popular surgical method of contraception in human males.

Give two advantages of a small family.

What is meant by family welfare centres? What is the symbol of family welfare in our country?

Sterilisation in men means preventing the flow of sperms into the seminal vesicles by cutting and ligating the vas deferens. Can there be a corresponding operation made in women? If yes, where?