Invertebrate classificationVersión en línea Choose the correct answer to the question about invertebrates. por Alex Gorriz 1 Tentacles with stinging cells a ANNELID (WORMS) b CNIDARIA c ECHINODERM d PORIFERA (SPONGES) 2 Soft-bodied with internal or external shells a MOLLUSK b ARTHROPOD c ANNELID (WORMS) d PORIFERA (SPONGES) 3 Hard external skeleton a MOLLUSK b ANNELID c PORIFERA (SPONGES) d ARTHROPOD 4 Soft body with two openings a MOLLUSK b CNIDARIA c ARTHROPD d ANNELID (WORMS) 5 Fixed in the ground and live in water a ANNELID (WORMS) b MOLLUSKS c PORIFERA (SPONGES) d ARTHROPOD 6 Covered with spines or spikes a CNIDARIA b ECHINODERM c ARTHROPOD d ANNELID 7 Exoskeleton and more than one body section a ANNELID (WORMS) b CNIDARIA c ECHINODERM d ARTHROPOD Feedback 1 Tentacles amb cèl·lules hurticants 3 Esquelet extern dur (exosquelet) 4 Cos tou amb dos obertures 5 Fixada al terra i viu a l'aigua 6 Cobert d'espines o punxes 7 Exosquelet i cos fomat per més d'una secció
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