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BIOL 337 Final: LAB-EXAM notes

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BIOL 337
Holly Caravan

LAB 1: Mollusca: Gastropoda: Snail Annelida: Clitellata: Earthworm Arthropoda: Insecta: Beetle Arthropoda: Arachnida: Spider Mollusca: Bivalvia: Clam Echinodermata: Stelleroidea: Starfish Arthropoda: Malacostraca: Crayfish Cnidaria: Scyphozoa: Jellyfish Cnidaria: Subphylum Anthozoa: Sea Anemone Arthropoda: Arachnida: Scorpion Porifera: Demospongiae : Sponge: Nematoda: -------- : Roundworm Arthropoda: Malacostraca: Crab Mollusca: Bivalvia: Oyster Mollusca: Gastropoda: Conch Annelida: Clitellata: Leech Echinodermata: Echinoidea: Sea Urchin Platyhelminthes: Trematoda: Fluke Chordata: Cephalochordata: Lancelet Cnidaria: Subphylum Anthozoa: Coral Platyhelminthes: Cestoda: Tapeworm Mollusca: Gastropoda: Limpet Annelida: Polychaeta: Fanworm/Featherworm Echinodermata: Holothuroidea: Sea Cucumber Mollusca: Cephalopoda: Cuttlefish Arthropoda: Merostomata: Horseshoe crab Echinodermata: Stelleroidea: Brittle Star Chordata: Tunicata (Urochordata)/ Ascidiacea Echinodermata: Echinoidea: Sand Dollar Arthropoda: Arachnida: Sun Spider/ Wind Scorpion Lab 1: Sponge: Grantia CS. Atrium Ostia Incurrent Canals Choanocyte Chamber Choanocytes Osculum Spicules Show Water flow and Where food particles are trapped. Sponge: Grantia L.S. How are Gametes Released? Gametes released from Osculum through ostia, when sperm is released into the water and are caught by choanocytes, then transported to the eggs for fertilization. Cnidaria: HYDRA: CS Hydra: LS: In which tissue layer are Cnidiocyte located? Located in the epidermal cells formed in the tentacles to aid in prey capture since they act as stingers. If they were in more inner layers they wouldn’t be very effective. Examine specimens and whole mount of obelia (hydrozoan), how does it differ from hydra? What other very different hydrozoan is on display? Does it resemble hydra or obelia more? The obelia has numerous branching along its body, it has reproductive polyps instead of gonads. It specifically has 2 polyps, one for feeding (tentacles) and one for reproduction (budding). Also the epidermis resembles spikes on the outer covering. The other organism is Portuguese man of war, resembles the obelia more because the hydroid colony of the obelia resembles tentacles. Scyphozoa (Aurelia): How does the medusa form differ from the polyp form? Polyp form is cylindrical with a long stalk, lacks a vellum and sense organs, reproduces asexually and is sessile. Medusa is free living motile and have a flat, round shaped body. The vellum is present, there are sense organs, four gonads and medusa reproduce sexually. Metridium: (Anthozoa, Hexacorallia) Compare and contrast this organism with hydra: Both have tentacles containing cnidocysts that capture food. Both have a polyp stage Both have a mouth on upper surface. Metridium contains a pharynx and mesentries. Examine corals on display, which of the organisms you drew do they most closely resemble? Corals resemble Cnidaria, more specifically they resemble the Obelia. Both contain polyps and are found attached by a basal membrane to hard surfaces. LAB 2: Annelida: Polychaeta: Blood Worm: Predator: Annelida: Polychaeta: Feather duster worm: Filter Feeder Platyhelminthes: Cestoda: Tapeworm: Parasite: Annelida: Clitellata: Leech: Ectoparasitic: Annelida: Polychaeta: Ophelia: Filter Feeder Nematoda: --------: Ascaris: Parasite Annelida: Polychaeta: Tube Worm: Filter Feeder Annelida: Polychaeta: Sea Mouse: Predator Lab 2: Platyhelminthes: Turbellaria: Planaria: CS Platyhelminthes: Turbellaria: Planaria: W.M. Platyhelminthes: Trematoda: Clonorchis: Turbellaria: Trematoda: Feeding Gut is multibranched. Gut is 2 lobed. Has a protrusible pharynx used Lives in an intermediate host, in catching prey and they are endoparasitic, living transferring them to the inside host tissue and feeding adjacent mouth opening. directly from their bodies (Extracellular) (diffusion?) Reproduction Simultaneous Hermaphrodites, Hermaphroditic, eggs come sperm exchange + egg from definitive host and are fertilization can occur when eaten by the intermediate host individuals interact. where they hatch. Asexual reproduction can occur where Asexual reproduction Miracidium develops to a (detaching tail where each can sporocyst that has redia which grow to form new individual). facilitate the asexual reproduction of individuals. Locomotion Move by beating cilia on the Attaches to host using oral ventral surface, subtle waves of
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