Classification of Animals
Question
Which of the following is a correct match?
Moderate
Solution
Prawns (Arthropoda) have an open circulatory system. Functional body cavity is haemocoel.
Parapodia are lateral appendages in aquatic annelids (Nereis). They are absent in earthworm.
Roundworms (Aschelminthes) are pseudocoelomates. Liver fluke is a flatworm and is an acoelomate.
Protonephridia are the excretory structures of flatworms (Platyhelminthes).
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