Question

Is it necerssaary thsst homologus structure have common ancestor?

Answer 1

YA , IT IS NECESSARY THAT HOMOLOGOUS ORGANS HAVE COMMON ANCESTORS BCOZ ORGANS OF ANIMALS WITH DIFFERENT FUNCTION AND SAME BASIC STRUCTURE TELLS US THAT THEIR ANCESTOR HAVE COMMON DESIGN WHICH GETS LATER MODIFIED BY LIVING BEINGS FOR EASY SURVIVAL .

Answer 2

ya it is necerssaary thsst homologus structure have common ancestor