Question

annelidas are evolved rather than round worms
explain ​

Answer 1

Answer:

Annelids are segmented worms whereas roundworms are not segmented. Further, annelids have a true coelom while roundworms have a pseudocoelom. This means annelids have a well-developed mesoderm while roundworms lack a mesoderm. These are the main features that distinguish annelids from roundworms

Answer 2

It now seems that segmentation can appear and disappear much more easily in the course of evolution than was previously thought.