Why do modern whales have small remnant hip bones in their s

Why do modern whales have small remnant hip bones in their skeleton? What is a vestigial structure in your own body?

Solution

Vestigial organs are those organs which are no longer of use in course of time. These organs have stopped evolving as they have lost their function during evolution but are still retained in the body. For eg, in humans appendix is present which is now not used by the body as today\'s human being do not eat much cellulosic or hard food. Whales have still retained their pelvic or hip bones and they have now been used to study their function. It has been observed that the pelvic bone has been related with sexual selection. The bigger the penis, the bigger was the pelvic bone. The larger the size of the bone, more female attraction for mating.