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13 Cards in this Set
- Front
- Back
How do amino acids tell us about the relatedness of species?
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Similar amino acid sequences implies closer relationship
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Phylum Porifera
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lacks true structure
water flows out through osculum (little mouth) collar cells- have flagella that creates water current Spicules- rough parts for protection made from calcium carbonate Spongin- flexable fibers of protein asymetricle filter feeders collar cells and amebosites engulf and transport nutrients sexual or asexual reproduction hermaphrodites budding durring cold winters No nervous system |
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Phylum Molluska
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snails, slugs, oysters, clams, octopus, squids
soft body, hard shell radula scrapes up food cephalopods have well developed nervous system |
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Phylum Annelida
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Hirudinea- Leaches
Oligochaeta- Earthworms Polychaetes- Marine Worms (with appendages) full digestive tract crop- stores food gizzard- grinds food nephridia- passes urea |
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Phylum Arthropoda
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Spiders, Beetles, Bees, Wasps, Butterflies, Moths, Etc.
segmented body molts exosceleton open circulatory system single chambered heart solid waste-anus malphignian tubules- remove nitrogenous waste from blood sexual reproduction |
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Phylum Echinodermata
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starfish
watervascular system- canals branch to tube feet (feeding and respiration) radial symmetry dueterostomes |
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Animal Body Plan
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1. Polarization- head is where sperm enters
2. Cleavage- zygote divides repeatedly. More cells form blastula 3. Gastrulation- blastula creates internal cavity |
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Gastrula (3 layers of cells)
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Ectoderm- skin, nervous system
Endoderm- Digestive tissue Mesoderm- muscles, reproductive and circulatory system |
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Protosome v. Deuterostome
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dueterostomes- anus first, mouth second
Protosome- opposite |
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Oviparous
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Egg layed
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Viviparous
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Live birth (viva)
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Ovoviparous
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Born alive from the mother but held as an unshelled egg internally until birth
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3 classes of fish
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Agnatha- Lampreys, filter feeders
Chondricthyes- Chondros, cartilagenous fish Osterichthyes- Bony fish |