Some animals, such as jellyfish and flatworms, have a gastrovascular cavity which combines digestive and internal transport functions. Characteristics of the roundworms include all of the following EXCEPT: - They are pseudocoelomates. - They possess only longitudinal muscles causing whip-like movement. - They exhibit bilateral symmetry. - They exhibit segmentation. - They have a tube-within-a-tube body plan. The animals of Phylum Nematoda: - Are all considered to be scavengers. - Have a gastrovascular cavity. - Are diploblastic. - Have a fluid-filled body cavity that houses a well-developed reproductive system.
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Some animals, such as jellyfish and flatworms have a which combines digestive and internal transport functions. The correct answer is Gastrovascular cavity. Show more…
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The animal kingdom is divided into smaller groups of phyla. Each phylum is characterized by specific evolutionary adaptations. Drag each key characteristic to the correct animal group. Soft bodies, often with a hard outer shell Segmented bodies Radial body symmetry Unsegmented parasitic worms Shares the most recent common ancestor with chordates Bilateral body symmetry Lack of tissues or body symmetry Animals with backbones Jointed appendages; most numerous and diverse phylum of animals
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Which of the following combinations of phylum and description is correct? (and why?) a) Nematoda - roundworms, internal skeleton b) Porifera - gastrovascular cavity, no coelom c) Echinodermata - radial symmetry as a larva, coelom d) Platyhelminthes - flatworms, gastrovascular cavity, no body cavity
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