Biology, asked by saurockzz4190, 9 months ago

Mantle is formed by (1)Soft and spongy layer of skin (2)Spicules or spongin fibres (3)Circular and iongitudinal muscles (4)Calcareous shell

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Answered by AbdJr10

1

Answer:

4. mantle are made up of calcareous shell

Explanation:

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