A. corals B. oyster Del 4. All invertebrates are animals that A. have hard shells B. have no backbone D. sp 5. Which of these groups of animals belong to echin A. bees, butterfly and mantis B. sa C. earthworm, leeches and tapeworm 6. To what subgroup of arthropods do invertebrates A. echinoderms B. crustaceans 7. They are characterized as marine animals with si tube feet and radial symmetry as adult. Which gre A mollusks B. echinoderms
