Filter feeders called rotifers collect digestive and excretory wastes in what primitive organ?

Filter feeders called rotifers collect digestive and excretory wastes in what primitive organ?

  • Correct Answer: cloacal bladder
  • liver
  • bile duct
  • simple stomach

Explanation: The rotifers are filter feeders that will eat dead material, algae, and other microscopic living organisms, and are therefore very important components of aquatic food webs. Rotifers obtain food that is directed toward the mouth by the current created from the movement of the corona. The food particles enter the mouth and travel to the mastax (pharynx with jawlike structures). Food then passes by digestive and salivary glands, and into the stomach, then onto the intestines. Digestive and excretory wastes are collected in a cloacal bladder before being released out the anus.

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