You discover a new organism with the following characteristics: the body is wormlike and has a fluid-filled cavity, the feeding organ looks like a proboscis, and there is a complete digestive tract. The organism is probably a(n)

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The presence of a fluid-filled cavity, proboscis-like feeding organ and a complete digestive tract are all characteristics of ribbon worms. Annelids have segmented bodies and nematodes have unsegmented bodies with a pseudocoelom. Flatworms have a simple digestive cavity without a complete digestive tract. Horsehair worms are parasites and have a long and thin body without a digestive tract.

You Discover a New Organism with the Following Characteristics: the Body