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

Question

Which of the following is present in mollusks but not in echinodermates? (A) Flame cell (B) Malpighian tubules (C) Kidney (D) None of the above

Tardigrade Admin · Accepted Answer

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.

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

Flame cell

Malpighian tubules

Kidney

None of the above

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.