A student observes a wormlike organism crawling about on dead organic matter. Later, the organism sheds its outer covering. One possibility is that the organism is a larval insect (like a maggot). However, it might be a member of the phylum ________, and one way to distinguish between the two possibilities is by looking for the presence or absence of ________.

Question

Quizplus · Accepted Answer

Nematodes have a cuticle that they shed, and they lack a circulatory system, which distinguishes them from larval insects.

A Student Observes a Wormlike Organism Crawling About on Dead