Excretory system, consisting of protonephridia tubes, are present in phylum:
Correct answer: C. Platyhelminthes
- A. Porifera
- B. Annelida
- C. Platyhelminthes
- D. Cnidaria
Explanation
In Platyhelminthes, protonephridia are present. Protonephridia likely first arose as a way to cope with a hypotonic environment by removing excess water from the organism (osmoregulation).
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