logging in or signing up MOLLUSCA Power Point Melinda Download Post to : URL : Related Presentations : Let's Connect Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 6773 Category: Education License: All Rights Reserved Like it (3) Dislike it (0) Added: February 20, 2008 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... By: adityamaura (29 month(s) ago) can u enable it to download plz Saving..... Post Reply Close Saving..... Edit Comment Close By: adityamaura (29 month(s) ago) can u enable it to download plz Saving..... Post Reply Close Saving..... 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Most produce a hard exterior shell while some produce an internal shell; however, a few species have no shell such as garden slugs or sea nudibranchs. Posses a mantle (A “fleshy fold” that surrounds most of the body and protects the major organs) All classes of mollusks excluding the bivalvia have a radula (A tooth like chitinous ribbon used to tear apart food and bore holes in prey) The nervous system is composed of a relatively undeveloped brain and organized ganglia (A group of nerve cells forming a nerve center)Features Shared With Related Groups: Features Shared With Related Groups Tissue: Radiata Platyhetminthes Nematoda Rotifera Annelida Anthropoda Lophophorates Echinodermata Chordata Bilateral Sym.: Platyhetminthes Nematoda Rotifera Annelida Anthropoda Lophophorates Echinodermata Chordata Body Cavity: Nematoda Rotifera Annelida Anthropoda Lophophorates Echinodermata Chordata Coelom: Annelida Anthropoda Lophophorates Echinodermata Chordata Protosome: Annelida AnthropodaGet Acquainted With Mollusks!: Get Acquainted With Mollusks! Mollusca Conchifera Aculifera Solenogastres Caudofoveata Placophora Tryblidiacea Gastropoda Scaphopoda Bivalvia Cephalopoda Phylum Sub-Phylum Class Kingdom Animalia Two Classification Systems: Gastropoda Scaphopoda Bivalvia Cephalopoda Aplacophora Polyplacophora Monoplacophora 1 2Fundamental Biology: Fundamental Biology World distribution could rival some extremophiles Extreme Habitats: -Deepest parts of the ocean under immense pressure at thermal vents to the thin air at 5,000m on the Himalayan Mountains -Thermal springs at temperatures reaching 104 degrees Fahrenheit, to ice frozen from artic winters Reproduction: -Sexual -Different species have adapted to accommodate their motion capabilities: Many of those species which are fixed in location are hermaphrodites, meaning they possess the sex organs of both sexes. Other mobile species are known to fertilize an area in hopes of fertilizing a patch of eggs left by a female. More Fundamental Biology: More Fundamental Biology Mode of Nutrition: -Heterotrophic -All classes of mollusks excluding the bivalvia have a radula - used to scrape algae from hard surfaces or attack and kill prey. Others species entrap prey with projectile mucus, or secrete acid to kill, immobilize, and decompose what they are hunting Ecological roles: -Herbivores (primary consumers) feed off of local plant life, such as algae, weeds, or crops -Carnivores (secondary consumers) prey on the primary consumers and keep their population at equilibrium, which in turn helps the plant life remain abundant -Decomposers break down the dead and decaying matter in their habitat Why Mollusks are Important + Fun Facts: Why Mollusks are Important + Fun Facts Everyone is familiar in someway with at least one member from the amazingly diverse phylum known as Mollusca. A variety of mollusks, such as clams, scallops, shellfish, and even squid and octopi, provide an appetizing seafood dish. The shells of mollusks have been used as ornamental jewelry, charms, and even currency. Of course, pearls make for highly valued earrings and necklaces. Countless horror movies were produced with inspiration from the unknown tentacled-monsters based on squid and octopi. Bulinus globosus, an aquatic snail found in northern Zimbabwe, hosts a parasite which causes the disease schistosomiasis, and is a major health problem in many developing countries. On the other hand, venom produced from some species is being researched for medical use A species of Octopus has the uncanny ability to imitate other creatures to escape predators Slide8: Pictures as taken from www.personal.psu.edu/slr934 You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.