Question : Which of the following has no skeleton at all?
Option 1: Star fish
Option 2: sponge
Option 3: Jelly fish
Option 4: Sliver fish
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Correct Answer: Jelly fish
Solution : The correct option is Jelly fish.
Jellyfish do not have a skeleton at all. They are made up of a jelly-like substance called mesoglea, which is supported by a network of fibers. Silverfish have an exoskeleton made of chitin. Sponges have a skeleton made of spicules, which are tiny needle-like structures made of calcium carbonate or silicon dioxide. Starfish have an endoskeleton made of ossicles, which are small plates of calcium carbonate.
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