Bio – Ch. 33

Nematodes and arthropods are the largest ecdysozoan phyla. Which of the following statements are true? Select all that apply. The cuticle in nematodes lengthens as the animal grows. Both nematodes and arthropods must molt in order to increase in size. Arthropods possess an open circulatory system. Nematodes are acoelomate, whereas arthropods are coelomate. Nematodes possess … Continue reading Bio – Ch. 33