Biology Forums - Study Force

Metanephridial organs are common in:
  a. mollusks.
  b. flatworms.
  c. cnidarians.
  d. sponges.
  e. insects.

Question 2

The main difference between protonephridia and metanephridia is that:a.
   protonephridia are involved in osmoregulation, while metanephridia are involved in
  excretion.
  b. protonephridia consist of blind flame cells, while metanephridia consist of tubules open at
  both ends.
  c. protonephridia are involved in excretion, while metanephridia are involved in
  osmoregulation.
  d. protonephridia consist of tubules open at both ends, while metanephridia consist of blind
  flame cells.
  e. protonephridia are found in annelids and metanephridia are found in flatworms

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