So today you were handed back your tests and on the whole everyone did fairly well. A general reminder, 97 % of all animals on our Earth our invertebrates. This is something that most people got wrong on the test and it is important to keep in mind when studying Life Science.
Today we started on the Phylum that deal with Mollusks. There are three classes of Mollusks that exist which are Gastropods, Bivalves, and Cephalopods. Tonight you are supposed to read pg. 330 to 333 tonight and answer complete questions # 1-2. This homework will go into more specific details about the different classes of Mollusks.
Somethings that you guys already knew about these creatures are listed below...
Slug - slimy, slow, DO NOT have a shell, move on a film of mucus, they have poison and bright colors to prevent being eaten by predators.
General characteristics that we wrote down in class about Mollusks were that they
Today we started on the Phylum that deal with Mollusks. There are three classes of Mollusks that exist which are Gastropods, Bivalves, and Cephalopods. Tonight you are supposed to read pg. 330 to 333 tonight and answer complete questions # 1-2. This homework will go into more specific details about the different classes of Mollusks.
Somethings that you guys already knew about these creatures are listed below...
Gastropods
Snail - slimy, slow, have a shell, move on a film of mucus, and they cannot hear, live on land and water.Slug - slimy, slow, DO NOT have a shell, move on a film of mucus, they have poison and bright colors to prevent being eaten by predators.
Bivalves
Clam - two shells held together with muscle, make pearls, can eat them, clams is generic name to refer to mussels, scallops, and oysters.
Cephalopods
Octopus - 8 legs (tentacles), extremely smart, suction cups, squirts ink when it feels threatened.
Squids - Extremely fast, is long and skinny, swims tail end first, squirts ink when it feels threatened.
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| Gastropods |
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| Bivalves |
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| Cephalopods
All images found at Google Images
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General characteristics that we wrote down in class about Mollusks were that they
- are invertebrates
- have gills
- contain a mantle - a soft layer of tissue that covers the internal organs
- contain a foot that allows them to move, dig, or catch prey.
- most of them have a open circulatory system
- are bilaterally symmetric
Here are two cool links to short clips on the octopus and squids.
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