Which have a more complex body systems, free-living or parasitic roundworms?
Biology · High School · Wed Jan 13 2021
llm
Answered on
Correct answer is Free living roundworm.
Roundworms (phylum Nematoda) have a slightly more complex body plan. Segmented worms (phylum Annelida) are the most complex animals with worm-like body plans. A study of worms can illuminate a possible history of how some organ systems and body features evolved.