what is the hard shell of shellfish made up of?
a. sulphur
b. calcium carbonate
c. magnesium oxide
d. phosphoros
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Answer:
calcium carbonate is the answer
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1
chitin
Shellfish consists broadly of 2 types of animals, crustaceans and mollusks. Crustaceans are invertebrates with segmented bodies, protected by hard shells made of chitin, and include shrimp, lobster, crayfish, crab, and krill. Mollusks are invertebrates with soft bodies, divided into foot and visceral section.....
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