1. Describe specialized feeding structures of parasitic platyhelminths.
2. Some parasitic flatworms have a very complicated life cycle with more than one host. Infer why this might be adaptive.
3. How do free-living nematodes contribute to the carbon cycle?
4. Apply what you know about pinworms to develop one or more recommendations for preventing pinworm infections in humans.
5. Platyhelminths and nematodes are both worms. Justify classifying them in different invertebrate phyla.

please rewrite the answers to make them as brief and concise but clear with easy grammar and language as possible