Question

multiple choice question
the phylum of segmented worms is called , and includes earthworms, leeches, and polychaetes (marine segmented worms).
arthropoda
nematoda
annelida
mollusca

Explanation:

• Arthropoda: This phylum includes insects, crustaceans, arachnids, etc. They have jointed appendages and an exoskeleton. Earthworms, leeches, and polychaetes do not belong here.
• Nematoda: Roundworms are in this phylum. They have a cylindrical body. Segmented worms are not nematodes.
• Annelida: This is the phylum of segmented worms. Earthworms (Oligochaeta), leeches (Hirudinea), and polychaetes (Polychaeta) are all classes within Annelida.
• Mollusca: This phylum includes snails, clams, octopuses, etc. They have a soft body often protected by a shell. Segmented worms are not mollusks.

Answer:

C. Annelida