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High School Biology: From Sponges to Invertebrate Chordates - Sponges, Cnidarians, Flatworms, and Roundworms
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High School Biology: From Sponges to Invertebrate Chordates - Sponges, Cnidarians, Flatworms, and Roundworms
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12 Questions

1. Flatworms take in oxygen and excrete carbon dioxide via
2. The animal group characterized by having muscles, cephalization, bilateral symmetry, three embryonic cell layers, and no coelom is the
3. The __________ of roundworms constrains the worm’s size and enables fluid pressure to build up in the psuedocoelom.
4. The collar cell of sponges
5. The sheep liver fluke lives in a snail during the __________ phase of its life cycle.
6. The nematocyst
7. A common roundworm parasite in humans in the United States is
8. Roundworms are in the phylum
9. Which of the following is true about corals?
10. The coelenteron
11. Most flatworms reproduce by
12. Water and wastes flow out of sponges primarily through the

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