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STD 11 - 4. Animal kingdom — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 4. Animal kingdom1 Mark
MCQ
Which organ system is lacking in the animals that bear water vascular system?
  • A
    Nervous system
  • ✓
    Excretory system
  • C
    Circulatory system
  • D
    Sensory system
✓

Answer

Correct option: B.
Excretory system
b
Water vascular system is characteristic feature of echinoderms. In echinoderms, specialised excretory system is absent. The excretory products diffuse out from the body tissue into coelomic fluid from where waste is eliminated out.

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