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Excretory Products and their Elimination — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYExcretory Products and their Elimination1 Mark
MCQ
The nephridia in earthworm are analogous to:
  • A
    Gills of Prawn
  • B
    Trachea of insects
  • C
    Nematoblasts of Hydra
  • D
    Flame cells of Planaria
✓

Answer

  1. Flame cells of Planaria

Explanation:

A flame cell is a specialized excretory cell found in the simplest freshwater invertebrates, including flatworms, rotifers and nemerteans. These are the simplest animals to have an excretory system. Flame cells function like a kidney, removing waste materials. Bundles of flame cells are called protonephridia. 

 

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