Bio 240 Week 9 Notes
Bio 240 Week 9 Notes BIO 240
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This 3 page Class Notes was uploaded by Miriam Valenzuela on Friday April 10, 2015. The Class Notes belongs to BIO 240 at San Francisco State University taught by Dr. Andrew Swei and Dr. Dennis Desjardin in Spring2015. Since its upload, it has received 114 views. For similar materials see Second Semester Biology in Biology at San Francisco State University.
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Date Created: 04/10/15
Invertebrates Porifera freshwater water pumped through body wall male and female Eumetazoa true animals have tissues Cnidarians radial symmetry endoderm ectoderm gastrovascular cavity sessile polyp motile medusa Example Jellies Anemones Corals A Hydrozoa a alternate between polyp and medusa B Scyphozoa a dominant medusa stage C Cubozoa a highly toxic D Anthozoa a polyps only Coral Reefs A solitary and colonial B calcium carbonate secreted at basal plate C Cellular Respiration carbon dioxide water and a home D Photosynthesis oxygen glucose glycerol amino acids Biateria bilateral symmetry triploblastic C separate mouth and anus D true coelom wgt Tissues mass of interconnected calls Gut derived from endoderm Coelom space between gut and body Functions of Coelomic Cavity Circulation Reproduction Suppon Payheminthe complex nervous system hermaphrodites generate using stem cells Turbellaria free living hermaphrodites predators Monogenea parasites of fish ciliated larva reproductive organs dominate Trematoda trematodes vertebrate parasites holds host with 2 suckers Symbiosis one species living intimately with another Parasitism symbiont benefits at the expense of the host Transmission High Reproductive Output Behavioral Modification Rotifera fresh water complete digestive tract smaller than protists parthenogenesis sexual reproduction if conditions like crowding occur Mollusca marine but some freshwater soft bodied animals contain Muscular Foot Visceral Mass Mantle separate sexes ciliated larval stage called trochophore Gastropoda marine but some freshwater and terrestrial gastrostomach poda foot torsion animal s anus and mantle end up above head Bivalvia clams oysters mussels and scallops shell with two halves radula has been lost tentacles and eyes suspension feeders Convergent Evolution Bivalves have equivalent valves Brachiopods have inequivalent valves Cephalopods chitin based beak used to slice up food before radula breaks it down complex eyes chromatophores pigments in cells Annelida segmented earthworms leeches present in all habitats unjointed movable appendages segmentation Oligochaeta earthworms Polychaeta Polychaetes Hirudinea Leeches
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