Name: ______________________________ Date: ________________ Per: ____
Phylum Cnidaria Video
1. What makes most animals classified differently than plants?
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2. Sea Anemone’s were originally classified as ________________.
3. Abraham Trembley made what observation about the so-called
plants that he was studying? ____________________________
4. What did Abraham Trembley do to finalize that the organisms was indeed an animal?
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5. What were the cnidarians’ great inventions that became traits to many other
animals? ________________________ and __________________________
6. Sea Anemones do not have bones. So, how is the sea anemone able to stand and
enlarge? ______________________________________________________
7. Cnidarians have 2 sets of muscles that contract with the aid of _______________
___________.
8. Cnidarians were the first active ____________
9. What lines each tentacle, and what is its function? __________________, and
they function to _________________________________________________
10. What triggers the nematocysts to fire? ________________________________
11. What happens to the Gobi when it gets too close to the sea anemone?
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12. Describe the fight or combat between two sea anemones, from start to finish.
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13. Not all cnidarians are enemies. Explain a beneficial cnidarian relationship.
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14. What happens the same day and night of each year for coral? ________________
15. Stomphia is a solitude sea anemone. How is Stomphia different that other sea
anemones? Explain what happens with the Sea Star.
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Name: ______________________________ Date: ________________ Per: ____
16. Measurements of nerve impulse were taken in stomphia to determine movement.
Explain the relationship between the “feeding” impulse and the “moving” impulse.
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17. Cnidarians were first group to do what? ________________________________
18. Cnidarians began with a body plan on the sea floor, sessile. What happened to
cnidarians over time?
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19. What feeds on jellyfish? ___________________________________________
20. Describe the life cycle of Moon jellies.
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21. What do moon jellies feed on when young? ______________________________
22. Scientists believed that Jellyfish are not designed for easy movement in water.
Explain the experiment and the discoveries the scientist made.
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23. Jellyfish thrive at upper ocean levels, are they found in great depths as well? _____
24. The largest predator in the world is Preya. What does it look like?
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25. When startled what happens to Colobonema’s tentacles?
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26. Describe the “never seen before” cnidaria found at 8000 feet.
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