Best complete the chart is X: Roundworms and Y: Flatworms. Thus, option D is correct.
What are the difference between round worm and flat worm?
Round worm are the cylindrical parasitic worm present in the intestines of mammals where as flatworm or tapeworm are the long ribbon-like parasitic flatworm in intestines.
Round worm a pseudocoelomate animal belong to the phylum Nematoda, superfamily Ecdysozoa while flatworm are acoelomate animal belong to the class Cestoda superfamily Lophotrochozoa.
Round worm grow up to 35 cm and have cuticle on outer surface while Flatworm size vary between 1 mm and 15 cm have no cuticle.
The body of roundworm has unsegmented body and the sharp stylet used for sucking while body of flat worm has segmented body and have four tentacles used for sucking
Round worm shows gliding locomotion and are Hermaphrodites where as flatworm shows thrashing motion and are unisexual.
Example of roundworm are Filaria worms, Ascaris, Trichinella etc while for flat worm Taenia solium, Taenia saginata etc. hus, option D is correct.
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