Sea Cucumbers Belong to the Echinoderm Class

Q8: Echinoderms and hemichordates are more closely related

Q9: The echinoderms that most closely resemble fossil

Q10: In sea stars,contraction of the _ force

Q11: The skeleton of sea urchins consists of

Q12: Coiled masses of fecal material called _

Q14: The characteristic larval stage of brittle stars

Q15: In the sea stars,a(n)_ groove runs along

Q16: Synchronous spawning by enteropneusts suggests the presence

Q17: The principal nitrogenous waste of sea stars

Q18: Embryologically,the echinoderm water vascular system originates as