Question

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

Answer 1

Answer is D - convergent evolution