In human males, the testes lie in the scrotam outside the body because it helps in the:

Which of the following statements are true for flowers ?

(i) flowers are always bisexual

(ii) they contain sexual reproductive organs

(iii) they are produced in all groups of plants

(iv) after fertilisation they give rise to fruits

The correct sequence of organs in the male reproductive system for the transport of sperms is:

Which among the following are not the functions of testes at puberty?

(i) formation of germ cells

(ii) secretion of testosterone

(iii) development of placenta

(iv) secretion of estrogen

During adolescence, several changes occur in the human body. Mark one change from the following associate with sexual maturation in boys: