Chitin Is a Long-Chain Polymer Derived from Glucose

question 50

Multiple Choice

Chitin is a long-chain polymer derived from glucose. It strengthens cell walls of fungi and the outer covering (exoskeleton) of arthropods (including crabs, shrimps, and insects) . The presence of chitin in these groups is likely due to ________.

• A) secondary endoparasitism
• B) horizontal gene transfer
• C) paraphyletic evolution
• D) convergent evolution

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