Question

which of the following worms have segmentation? a. platyhelminthes b. aschelminthes c. annelida d. all of the above

Explanation:

• Platyhelminthes (Flatworms): They are unsegmented. Their body is flat and lacks true segmentation.
• Aschelminthes (Roundworms): These are also unsegmented. Their body is cylindrical and not divided into segments.
• Annelida (Segmented Worms like Earthworms): They have true segmentation. The body is divided into a series of repeated segments both externally and internally.

Answer:

C. Annelida