a ) Ascaris , Enterobius , are some animals with false coelom and jelly fish , sycon , fungia , planaria , etc. are some acoelomate animals
b ) notochord are the place for muscles to attach for easy movement and locomotion .
c ) chordates are triploblastic , coelomate , dorsal ( stomach side ) and they have also notochord. kidney like organs are present .