Cnidarians
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A.Organized Body Made of One or More Cells - Brett S.

Cnidarians have two two types of shapes. A bowl shape called a "Medusa" which lives on the higher sea level. And a vase shape called a "polyp." which is attached to the bottom of the ocean. Both of them are only a few cells thick and have a simple body formation.
Types of cnidarians are corals, anemones, jellyfish, and sea pens.
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B. Obtain and Use Energy - Brett S.

Jellyfish have barbs on their stingers so when they sting the barbs get stuck in the fish and it eats the fish after it stings it. They digest it through a hole on either the top or bottom of the jellyfish and thats how they obtain and use energy. Anemones are a type of polyp also known as a "water flower." they are tubular they can have lots of tenticals and to grow to be 6ft6in in diameter.


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C. Reproduce- Alex Tucker

Cnidarians reproduce asexually and sexually.The asexual way is when the jellyfish is still a polyp it starts swelling on it’s side and then that grows into a polyp then that grows into a young medusa. Later when the young medusa gets older it reproduces sexually by releasing sperm into the water and the female releases eggs into the water. Then the egg grows into larva and the life cycle starts over again.

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D.Grow and develop-Jelena P

Jellyfish first start out as an egg, They then turn into a larva, and later change into the polyp, After this stage they become a young medusa and then they turn into an adult medusa.


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E. Respond to Stimuli- Alex Tucker

Jellyfish respond to stimuli by shocking and sometimes paralyzing their prey. First when a fish brushes against its tentacles it triggers the barb and it stings the prey. It's a good defense, but some animals aren't affected by the sting. Some jellyfish tentacles wrap around the prey to shock it and some just fire and poison the prey.






F. Exchange Gases with the Environment-Jelena P

Far from the water. In each cell, oxygen from the water is exchanged for carbon dioxide and other cell wastes.
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Jellyfish diagram
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Resources:
Brennan, Joseph K, Jellyfish and Other Stingers, Chicago: World book Inc, 2001
National Geographic Society; Biggs, Alton, et al. Life Science.New York: Glencoe McGraw-Hill, 2002.
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