Question

1. what type of body plan do annelids exhibit?

annelids have a pseudocoelom.
annelids have a segmented body plan.
annelids are flat - bodied like platyhelminths.
annelids are round - bodied.

Explanation:

Annelids, such as earthworms, are characterized by a segmented body plan. A pseudocoelom is found in nematodes (round - worms), not annelids. Platyhelminthes (flat - worms) have a flat body, which is not the case for annelids. While some annelids may have a somewhat cylindrical shape, their key defining feature is segmentation.

Answer:

Annelids have a segmented body plan.