Nematodes and arthropods are the largest ecdysozoan phyla. Which of the following statements are true? Select all that apply.
a). Both nematodes and arthropods must molt in order to increase in size.
b). Arthropods possess an open circulatory system.
c). Arthropods are named for their jointed appendages.
d). Nematodes possess a closed circulatory system.
e). Both nematodes and arthropods possess an external covering or cuticle.
f). The cuticle in nematodes lengthens as the animal grows.
g). Both nematodes and arthropods have segmented body plans.
h). Nematodes are acoelomate, whereas arthropods are coelomate.
i). Some nematodes are parasitic on humans.
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Home » Biology » Nematodes and arthropods are the largest ecdysozoan phyla. Which of the following statements are true? Select all that apply. a). Both nematodes and arthropods must molt in order to increase in size. b). Arthropods possess an open circulatory system.