[Campbell Biology P.776] Which of the following statements about the internal anatomy of sha... | Practice Question
Which of the following statements about the internal anatomy of sharks is correct, according to the text?
A: The shark's intestine contains a spiral valve that reduces surface area for nutrient absorption.
B: Their digestive tract is proportionately longer than that of many other vertebrates.
C: The cloaca is a common chamber for the reproductive, excretory, and digestive tracts, with a single external opening.
D: Sharks have multiple external openings for their excretory and digestive systems.
Explanation
The text explicitly states: 'The reproductive tract of the shark empties along with the excretory system and digestive tract into the cloaca, a common chamber that has a single opening to the outside.' This directly confirms option C.