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INVERTEBRATE DIVERSITY I-REVIEW SHEET EXERCISE #7 -What is an invertebrate? An animal lacking a vertebral column (back bone) -Name some characteristics that separate animals from lower eukaryotes. Nutritional Mode: Heterotrophic; ingest and then digest with internal enzymes Cell Structure: Multicellular Eukaryotes that lack a cell wall; use proteins for structure support Specialized Cells: Nerve Cells; Muscle Cells Reproduction: Predominantly sexual w/ dominant diploid stage; Sperm- flagellated Egg- Non-motile Development: Cleavage -Name the three types of symmetry used to classify animals and name an animal that exhibits each type of symmetry. Asymmetrical-without symmetry; ex-sponges Radial-wheel; no left or right; ex-jelly fish Bilateral-has a left and right; mirror images; ex- human/crawfish -Name the three germ tissue layers Endoderm Mesoderm Ectoderm -Which germ layers are found in diploblastic organisms? Triploblastic? Diploblastic-2 Triploblastic-3 -Name and understand the differences between the three coelom types. How does mesoderm come into the definition? Acoelomate-no true body cavity Pseudocoelomate-false body cavity; not fully lines with mesoderm Coelomate-fully lined body cavity -Name one basic difference between a protostome and a deuterostome. Protostome- blastopore becomes mouth Dueterostome-blastopore becomes anus -What is a blastopore anyway? Blastopore is an opening into the archenteron during the embryonic stages of an organism . -When was the war of 1812? -What is the difference between monoecious and dioecious organisms? Monoecious- Dioecious- -For ALL of the follow animal groupings, make sure to think about: - their type of movement (i.e. sessile? How do they move?) -how they feed (filter feeder? Parasite?) -Separate sexes? -Diploblastic or triploblastic? -Coelom type? -Protostome or a deuterostome? -Examples of organisms in each grouping? -TRENDS? Coelom? Digestive tract? Tissue layers? Muscle tissue? Phylum Porifera - Be able to identify all of the following on a sponge diagram and know their function: Osculum Spicules Choanocytes (collar cells), Spongocoel - On a slide of a sponge ( Grantia) be able to identify the slide as a sponge and be able to identify the Spongocoel and Choanocytes -Spicules can be made of which types of materials?
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Calcium Silica -What does a sponge look like (feel like) that has a mineralized skeleton? Fibrous (protein) skeleton?
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