ILuvNatureSounds ILuvNatureSounds

29-11-2018
Biology

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hey y'all can you help me with a biology question, would really appreciate it :)

hey yall can you help me with a biology question would really appreciate it class=

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allysasingletary allysasingletary

29-11-2018

B. Chitin- its a hard and tough substance that occurs widely in nature, particularly in the shells (exoskeletons) of arthropods such as crabs.

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