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Unit 2: Relation of classification of living beings and evolution
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Arthropoda, Mollusca and Echinodermata
Unit 2 · Relation of classification of living beings and evolution
Arthropoda, Mollusca and Echinodermata
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8 min
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Question 1 of 16
1
What is the exoskeleton of an arthropod made of?
Calcium carbonate
Chitin
Cellulose
Calcium, the same as a snail's shell