Question

what are some characteristics of roundworms? ringed/segmented sectionssimplest animal with brain flat, soft bodiesplanaria- regenerate body partstapeworm (parasiteeyespots to detect light smooth, thin, tube - like bodiestwo body openings (mouth/anus)

Explanation:

Roundworms have smooth, thin, tube - like bodies and two body openings (mouth and anus). The first option describes segmented worms and the second describes flatworms.

Answer:

smooth, thin, tube - like bodiestwo body openings (mouth/anus)