ZoologyWhich of the following features is common to earthworm, prawn, and lancelet?

Which of the following features is common to earthworm, prawn, and lancelet?

  1. A

    Nephridia

  2. B

    Gills

  3. C

    Haemoglobin

  4. D

    Metamerism

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    Solution:

    Earthworm (Annelida), prawn (Arthropoda) and lancelet (Cephalochordata) exhibit metamerism. Gills are absent in earthworm. The respiratory pigment in the prawn is haemocyanin.  A respiratory pigment is absent in the lancelet. Nephridia are present in the earthworm; protonephridia are present in the lancelet; green glands are present in the prawn.

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