Which of the following is a characteristic of nematodes?
A)All species can be characterized either as scavengers or as decomposers.
B)They have only longitudinal muscles.
C)They have a True coelom.
D)They have a gastrovascular cavity.
E)Many species are diploblastic.

Question

Quizplus · Accepted Answer

Nematodes have only longitudinal muscles, which run along the length of their bodies and allow them to move by undulating their bodies back and forth.

Answer: D 
 Nematodes have a complete digestive system with a mouth, pharynx, intestine, and anus. This system includes a gastrovascular cavity, which is a sac-like cavity that serves as a stomach.

Note: A is incorrect because not all species of nematodes are scavengers or decomposers. Some are parasites, predators, or free-living. C and E are incorrect because nematodes have a False coelom (also called a pseudocoelom), which is a body cavity that is derived from the embryonic blastocoel and is partially lined with mesodermal tissue.

Which of the Following Is a Characteristic of Nematodes