Question:
Which of the following are found in platyhelminthes?
Which of the following are found in platyhelminthes?
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Flatworms have ladder-like nervous system and protonephridial flame cells for excretion; these are key features for identification.
Updated On: Jun 19, 2026
- Colloblasts and comb plates
- Pseudocoelom and Renette cell
- Green glands and statocysts
- Ladder like nervous system and flame cells
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The Correct Option is D
Solution and Explanation
Step 1: Understand platyhelminthes.
- Platyhelminthes are flatworms, bilaterally symmetrical, acoelomate invertebrates.
Step 2: Nervous system.
- They have a ladder-like nervous system: 2 longitudinal nerve cords connected by transverse commissures.
Step 3: Excretory system.
- Flame cells are specialized excretory cells that help in osmoregulation and removal of nitrogenous wastes.
Step 4: Comparison with other options.
- Colloblasts & comb plates: characteristic of ctenophores.
- Pseudocoelom & Renette cell: nematodes.
- Green glands & statocysts: present in crustaceans.
Step 5: Conclusion.
Hence, platyhelminthes possess ladder-like nervous system and flame cells.
- Platyhelminthes are flatworms, bilaterally symmetrical, acoelomate invertebrates.
Step 2: Nervous system.
- They have a ladder-like nervous system: 2 longitudinal nerve cords connected by transverse commissures.
Step 3: Excretory system.
- Flame cells are specialized excretory cells that help in osmoregulation and removal of nitrogenous wastes.
Step 4: Comparison with other options.
- Colloblasts & comb plates: characteristic of ctenophores.
- Pseudocoelom & Renette cell: nematodes.
- Green glands & statocysts: present in crustaceans.
Step 5: Conclusion.
Hence, platyhelminthes possess ladder-like nervous system and flame cells.
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