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No, they have no hard parts in their bodies.
Yes because it has no internal skeleton or backbone.
Yes because it has no internal skeleton or backbone.
radial
sea anemone possess hydrostatic skeleton . Its cavity is filled with seawater to extend its body and tentacles . The sea anemone closes its mouth and contracts its muscle fibres that are arranged in circles around its body . The contraction of these circular muscles put pressure on liquid of the body cavity . This pressure forces the body to maintain upright position
mutualism
Mussels have a sort of exo-skeleton. Their shell.
A cheetah has an endoskeleton, which is an internal skeleton.
The boney kind.
internal
This is called an exoskeleton.
It has an exoskeleton.