Which of the Following Echinoderms May Contain Venom Dangerous to Humans

Q43: Nutritionally,pterobranchs are<br>A)filter feeders.<br>B)parasitic.<br>C)mutualistic.<br>D)commensalists<br>E)predators.

Q44: Acorn worms belong to the class<br>A)Ascidacea.<br>B)Concentricycloidea.<br>C)Pterobranchia.<br>D)Enteropneusta.<br>E)Thaliacea.

Q45: Exchange of respiratory gases in enteropneusts is

Q46: Enteropneusta are wormlike as adults and pterobranchia

Q47: The circulatory system of enteropneusts sends blood

Q49: Enteropneusta and Pterobranchia are classes of animals

Q50: When feeding on a bivalve,a sea star

Q51: In sea stars,thin folds of the body

Q52: The major secretory and absorptive structures of

Q53: In sea stars,the _ surface is the