A) gills of prawn
B) flame cells of Planaria
C) trachea of insects
D) nematoblasts of Hydra
Correct Answer: B
Solution :
Excretory organs in earthworms are slender and coiled tubules called nephridia. According to their location and structure nephridia in earthworm are of three types septal, integumentary and pharyngeal. These performing same function (excretion) as the flame cells in Planaria.
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