To demonstrate your understanding of the phylum Nematoda, from the list provided, select all statements that characterize roundworms.

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Nematodes, or roundworms, are characterized by having a pseudocoelom, which is a type of body cavity that is not completely lined by mesoderm (hence "false body cavity"). They have a complete digestive system with both a mouth and an anus, allowing for a one-way digestion process. They also possess a ventral nerve cord, which runs along the belly side of the organism. Contrary to option C, nematodes do have a reproductive system, which is often very well developed and can be quite complex, allowing for the production of vast numbers of eggs or live offspring.

To Demonstrate Your Understanding of the Phylum Nematoda, from the List