1. Tardigrade
  2. Question
  3. Biology
  4. Which of the following is present in mollusks but not in echinodermates?

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Q. Which of the following is present in mollusks but not in echinodermates?

AFMCAFMC 2001

Solution:

Molluscs have $1$ or $2$ pairs of kidneys or renal organs or organs of bojanus (after it's discoverer). Kidneys (different from vertebrates kidneys) open into coelom at one end by a Reno pericardial aperture (nephrostome) and into the mentle cavity at the other end by nephridiopore.