CBSE BoardEnglish MediumSTD 6ScienceBody Movement1 Mark
Question
Do all animals have bones?
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Answer
No, all animals do not have bones. Bones are present only in the backboned animals. Even among the backboned animals, the skeleton of sharks are made entirely of cartilage.
The jellyfish, leeches and worms have no hard structure to support their bodies.
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