Acorn Worms Belong to the Class

Q39: Ambulacrarians and chordates are united into the

Q40: Of the following structures found in sea

Q41: The anterior region of the digestive tract

Q42: The echinoderms and hemichordates are<br>A)asymmetrical.<br>B)diploblastic.<br>C)deuterostomes.<br>D)ecdysozoans.<br>E)lophotrochozoans.

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

Q45: Exchange of respiratory gases in enteropneusts is

Q46: Enteropneusta are wormlike as adults and pterobranchia

Q47: The circulatory system of enteropneusts sends blood

Q48: Which of the following echinoderms may contain

Q49: Enteropneusta and Pterobranchia are classes of animals