Members of the phyla Ectoprocta, Brachiopoda, and Phoronida all possess a lophophore, which isa(n) ____
a. cluster of pores along the aboral surface, used for expelling wastes from the digestive tract
b. hard shell made of calcium carbonate
c. outpocket of the digestive tract, where metabolic wastes are processed before emptying into the digestive tract
for expulsion
d. circular fold with one or two rows of hollow, ciliated tentacles
e. extra body cavity surrounding the digestive tract filled with muscles used for locomotion
ANSWER: d
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