High-pich juvenile voice in males can be retained by

High-pitch juvenile voice in males can be retained by

Male Ascaris can be distinguished by

Male Enterobius can be recognised by

Male Enterobius can be recognised by

Male Enterobius can be recognised by

Pitch of the voice is lower in males than females as the vocal cords of man are

Pitch of the voice is lower in males than females as the vocal cords of man are

The male and female cockroaches can be ditinguised by their

Male and female cockroach can be identified by

A : The pitch of female voice is higher than the pitch of male voice . R : Pitch distinguishes between a shrill and a grave sound .