You find a new species of worm and want to classify it. Which of the following lines of evidence would allow you to classify the worm as a nematode and not an annelid?
A) It undergoes protostome development.
B) It is segmented.
C) It is triploblastic.
D) It has a coelom.
E) It sheds its external cuticle to grow.

Question

Quizplus · Accepted Answer

Nematodes are distinguished from annelids by several features, including their mode of growth. Nematodes shed their external cuticle to grow, a process known as ecdysis, which is not observed in annelids. Annelids grow by adding segments and do not undergo ecdysis. Choices A, C, and D are characteristics that can be found in both nematodes and annelids, and B indicates an annelid feature, not a nematode.

You Find a New Species of Worm and Want to Classify