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14 Cards in this Set
- Front
- Back
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What are the five classes of cnidarians and their identifying characteristics? |
The 5 classes are Anthozoa with sea anemones, corals Hydrozoa with hydra, Portuguese man-o-war Scyphozoa with jellyfish Cubozoa with box jellies Staurazoa with star jellies |
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What phylum do sea sponges belong to? |
Sponges are animals of the phylum Porifera |
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What is a choanocyte, what is it for? |
Choanocyte is a specialized cells that use flagella to move a steady current of water through the sponge.They make up Choanoderm, a type of cell layer found in sponges |
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What is a spicule? What is for? Where are they made? |
Spicule is a structrual support of a sponge.They provide structural support and deter predators.They are made from Spongin. |
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What 3 cell types make up a sponge? |
Collar Cells,flagellated cells1 |
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What phylum are sea walnuts a member of? |
Mnemiopsis |
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What are the comb rows in ctenophora for? |
They share several superficial similarities, they lack stinging cells. Instead, in order to capture prey, ctenophores possess sticky cells called colloblasts. In a few species, special cilia in the mouth are used for biting gelatinous prey |
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What is the life cycle of a cnidarian? |
1. One is a free-swimming jellyfish medusa stage 2. Second is an attached polyp stage |
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What is a planula? |
a free-swimming coelenterate larva with a flattened, ciliated, solid body |
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What is a nematocyst? Cnidocyst? |
Nematocyst is a stinging structure within each cnidocyte of a cnidarian that is used to poison or kill prey.Cnidocyst is the stinging cell of the cnidarian which contains a capsule called the nematocyst which is lined with the actual stinging structure, a barbed thread |
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Are cnidarians sexual or asexual, explain? |
They can be both sexual and asexual reproductions because there are many different types of cnidarians, each with a unique body structure, but the general reproductive process is the same |
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Differences in gastrodermis/epidermis. |
Epidermis is the outer cell layer of cnidarians formed by ectoderm and Gastrodermis makes up gut cavity or gastrovascular cavity and secretes digestive juices into the gastrovascular cavity |
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Sketch a simple drawing and identify the structures of Aurelia. |
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Sketch a simple drawing and identify the structures of a sponge. |
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