Find the COMMON NAME, the GENUS and the SPECIES
of one MARINE roundworm or ribbon worm, and tell me two cool facts about it.

Common name: nematodes or roundworms

Genus: Phylum Nematoda

species: mammal

facts:

They are invertebrates which have no backbone.

They can be microscopic, invisible to the naked eye and can also be as long as 20 feet.

i believe the correct answer from the choices listed above is the first option. the scientists need to look at the   validity of data, claims, hypotheses, and observations before  developing an argument. they base their arguments on facts that are present and they make sure they have proofs. 

explanation: