[Campbell Biology P.743] Which of the following describes a key physiological adaptation of ... | Practice Question

Which of the following describes a key physiological adaptation of flatworms for maintaining osmotic balance and eliminating waste?

  • A: They possess a complex circulatory system that distributes nutrients and collects wastes throughout their body.
  • B: They rely on specialized gills for efficient gas exchange and excretory processes.
  • C: They possess protonephridia, a network of tubules with ciliated flame bulbs that regulate osmotic balance and waste removal.
  • D: Their large body cavity facilitates efficient diffusion of gases and wastes throughout their tissues.

Explanation

The text states: 'their relatively simple excretory apparatus functions mainly to maintain osmotic balance with their surroundings. This apparatus consists of protonephridia, networks of tubules with ciliated structures called flame bulbs that pull fluid through branched ducts opening to the outside.'