Worms are invertebrates, meaning they do not have a backbone. The main types of worms include flatworms, roundworms, and segmented worms, each belonging to different biological groups.
Yes, worms are invertebrates as they lack a backbone or any bones in their bodies, which classifies them among animals without skeletal structure.
The main types of worms are flatworms (like flukes and tapeworms), roundworms, and segmented worms (such as earthworms), each with distinct biological characteristics.
An earthworm is a type of segmented worm, classified under the group called annelids, which are characterised by their segmented bodies.