what is echinodermata and revertebration ???
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a phylum of marine invertebrates which includes starfishes, sea urchins, brittlestars, crinoids, and sea cucumbers. They have fivefold radial symmetry, a calcareous skeleton, and tube feet operated by fluid pressure.
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A phylum of marine invertebrates which includes Starfish,sea urchins etc is called echinodermata.
Prolongation of a sound is called reverberation.
Hope it will help you
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Prolongation of a sound is called reverberation.
Hope it will help you
❤MARK IT BRAINLIEST❤
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helki
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