Some characters are given below i. Bilaterally symmetrical ii. Triploblastic iii. Segmented iv. Coelomate Which of the two phyla are characterized by the above all characters?

Step-by-step solution

Annelida and Arthropoda are bilaterally symmetrical organisms that are triploblastic, segmented and coelomates. Echinoderms are also bilaterally symmetrical organisms, but few show pentaradial, or five-sided, symmetry. Molluscs have bilateral symmetry but are unsegmented organisms.