[VadeRetro]

Insects are presumed to have evolved from segmented worms and, AFAIK, the simplest insects are just vastly more complicated than the most complex worms.

And yet every mature insect was once a segmented worm.

[merak]

And yet every mature insect was once a segmented worm.

You sound like some sort of an expert.

How did metamorphoses evolve?

For that matter, nobody seems to have any real proof of evolution but we know that metamorphoses works. Has anybody ever investigated the possibility that metamorphoses may have been the basic mechanism for the world's biological diversity?