Complex sentence: The larvae of echinoderms have bilateral symmetry but this is lost during metamorphosis when their bodies are reorganised and develop the characteristic radial symmetry of the echinoderm, typically pentamerism.
Split into simpler sentences: The larvae of echinoderms have bilateral symmetry but this is lost during. MERA WALA MUH ME LELE.metamorphosis when their bodies are reorganised and develop the characteristic radial symmetry of the echinoderm, typically pentamerism.