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| segmented worms: earthworms |
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| vertebrates and animals having a notochord (Humans) |
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| Hydras, jellyfish, sea anemones, corals |
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| Echinodermata? give example |
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| starfish and sea urchins and sea cucumbers |
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| unsegmented worms: roundworms |
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| (biology) the sequence of events involved in the evolutionary development of a species or taxonomic group of organisms |
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| Platyhelminthes? give example |
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| Rotifera, example Daphnia, know general characteristics re: symmetry, coelom, general structures |
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What are the three main themes of
Bio 106 |
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1) Organisms have similar functional needs
2)Organisms must obay physical laws
3)Understanding how an Organism works involves consideration of biochemisty, cell biology, physiology, ecology and evolution. |
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| Body symmetry- what are the types? |
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1) Asymmetrical (Porifera)
2) Raidial (Cnidaria)
3) Bilateral (Arthropoda) |
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| Burgess Shale fossiles- what do they tell us? (Hint. "wonderful Life") |
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| 16 yes it is important to generally know what the burgess shale fossils tell us e.g. the present body plans are not all the plans that once existed. Chordates may not have made it through the mass extinctions of the past |
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| What are the animals in the Phylum Porifera and what are their characteristics? |
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• Sponges
• "colony" of flagellated cells
• individual cells can potentially regenerate into a new individual |
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| What type of symmetry do sponges have? |
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| Asymmetrical (irregular in shape or outline) |
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| Phylum Cnidaria – animals in this phylum? Characteristics? |
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• Hydras, jellyfish(alternate between, polyp and medusa), sea anemones, corals
• ***gastrovascular cavity***
• stinging cells
• ***Radial symmetry*** |
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| Phylum Ctenophora- animals in this phylum? Characteristics? |
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• Comb jellies
• comblike ciliary plates
• ***gastrovascular cavity***
• ***Radiata (radial symmetry)*** |
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| Body plans of the bilateria (fig 32.8) |
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| Phylum Platyhelminthes? Characteristics? |
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Definition
• Flatworms
• dorsoventrally flattened
• no segmentation
• ***gastrovascular cavity
• ***bilateral, no coelom, protostome |
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| Phylum Rotifera Characteristics? |
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Definition
• Ciliated crown
• no digestive system
• bilateral, pseudocoelomates, protostome |
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| Phylum Nematoda Characteristics? |
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Definition
• Roundworms
• unsegmented
• no circulatory system
• bilateral, ***pseudocoelomate, protostome |
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| Lophophorates - several phyla (not req) |
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Definition
• Bryozoans, lampshells (brachiopods)
• bilateral, coelomate, protostome |
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| Phylum Mollusca Characteristics? |
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Definition
• Clams, snails, squids
• foot, visceral mass, mantle
• bilateral, coelomate, protostome |
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| Basic body plan of mollusks? (3 main parts) |
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Definition
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| whats is the Anatomy of a clam (3 main parts) |
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| Phylum Annelida Characteristics? |
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Definition
• Segmented worms
• **bilateral, coelomate, protostome |
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| Phylum Arthropoda Characteristics? |
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Definition
• Crustaceans, insects, spiders
• segmented body, jointed appendages, exoskeleton
• ***bilateral, coelomate, protostome |
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Definition
A comparison of early development in protostomes and deuterostomes
(See fig 32.9) |
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| Phylum Echinodermata Characteristics? |
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Definition
• Starfish, sea urchins
• bilateral, coelomate, deuterostome |
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| Phylum Chordata Characteristics? |
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• Lancelets, tunicates, vertebrates
• ***notochord, nerve cord
• ***bilateral, coelomate, deuterostome |
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| 32.1 Animals are _______ heterotrophic eukaryotes with _______ that develop from embryonic layers. |
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| What happens after the blastula stage, and before the gastrula stages of embryo development? |
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| what is Protostome development? |
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| folds of cells that line the central cavity bud off to form mesoderm and coelom |
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| what is Deuterostomes development? |
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| masses of mesoderm split off near the blastopore to form a coelom |
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| Radial symmetry diplobastic |
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| bilateral symmetry; triploblastic |
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| body cavity not enclosed by mesoderm |
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| body cavity enclosed by mesoderm |
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| digestive tube forms from the internal cavity. Coelom is not the digestive tube, remember the samurai example feeling into your body cavity. You will not be able to touch the inside of your digestive system by only cutting into your body wall |
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