You find what you believe is a new species of animal. Which of the following characteristics would enable you to argue that it is more closely related to a nematode than it is to an annelid?

Question

Quizplus · Accepted Answer

Nematodes and annelids are both worm-like creatures, but a key difference is that nematodes have a pseudocoelom (a type of body cavity that is not fully lined by mesoderm, often referred to as a hemocoel in this context), whereas annelids have a true coelom (a fully lined body cavity). Choices A, C, and D describe characteristics that could apply to both groups, making them less useful for distinguishing between the two.

You Find What You Believe Is a New Species of Animal