There are 3 classes of Cnidarians - Hydrozoa, Scyphozoa, and Anthozoa. Give an example of each.
Hydrozoa - hydra or Portuguese man of war, Scyphozoa - jellyfish, Anthozoa - coral, sea anemone, sea pens, sea fans, sea plumes
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15
What are gills?
Extensions of the body containing thin-walled blood vessels that allow for the absorption of oxygen from the outside surface
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15
Do sponges demonstrate metamorphosis?
Yes during sexual reproduction, when they change from the parenchymal larva which is planktonic into a mature sponge which is attached to a substrate.
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25
What is the difference between these two organisms?
A is a lampshell, a brachiopod. It has a dorsal and ventral shell, and ciliated tentacles. B is a clam,a bivalve which has a right and left side,a filter feeder
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15
What phylum has segmented worms?
Annelida. this phylum has segmented body parts, a true gut in a coelom, and a closed circulatory system
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15
Do sponges have specialized cells or specialized tissue?
specialized cells, (Cnidarians have specialized tissue)
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15
What phylum are tapeworms in? What is unique about them?
Phylum Platyhelminthes, cestoda. They live in the digestive tract of vertebrates. they have not gut or mouth, they absorb nutrients through their skin
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15
Which phylums have a true gut and which ones do not?
The remora attaches to the shark and eats scraps of food the shark drops, but doesn't harm the shark.What kind of symbiosis do the shark and remora demonstrate?
commensalism
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15
What type of symmetry is an indication of complexity of an organism?
Organisms with bilateral symmetry have a more complex nervous system(including a brain)
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banana
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star
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rocket
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baam
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15
How do nematocysts function?
It is a capsule that contains a coiled thread that can be shot outwards to catch prey or repel predators.
