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What kind of animals are in phylum Porifera and what are their key characteristics?
- Sponges
- Ingestive-feeding heterotrophs
- Asymmetrical bodies
- Food filtering cells called chaonocytes
- Reproduce sexually and asexually
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What kind of animals are in phylum Cnidaria? What are their key characteristics?
- Jellyfish, sea jellies, hydra, corals, sea anemones
- Radially symmetrical bodies
- Possess tentacles with stinging cells called cnidocytes that shoot nematocysts
- Two body plans: polyps and medusae
- Extracellular digestion
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What kind of animals are in phylum Platyhelminthes? What are their key characteristics?
- Flatworms, tapeworms, liver flukes
- Solid, unsegmented, bilaterally symmetrical worms
- No body cavity
- Digestive cavity has only one opening
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Differences between Acoelomates, Pseudocoelomates, and Coelomates
- Acoelomates: have no body cavity, flatworms
- Pseudocoelomates: develop a body cavity between the mesoderm and endoderm, roundworms
- Coelomates: have a body cavity bounded by mesoderm, connected by the coelem, annelids and mollusks
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What kind of animals are in phylum Nematoda? What are their key characteristics?
- Ascaris, pinworms, hookworms, Filaria
- Pseudocoelomates
- Unsegmented, bilaterally symmetrical worms
- Tubular digestive tract passing from mouth to anus
- Tiny and without cilia
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What kind of animals are in phylum Mollusca? What are their key characteristics?
- Snails, oysters, octopuses, nudibranchs
- Three part body: head-foot, visceral mass, mantle
- Many have shells
- Possess a unique tongue called radula
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What kind of animals are in phylum Annelida? What are their key characteristics?
- Earthworms, leeches
- Coelomates
- Complete digestive tract
- Possess bristles called "setae"
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What kind of animal is in class Gastropoda?
Snails
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What kind of animals are in class Bivalvia? How do they feed?
- Clams, oysters, scallops, and mussels
- Feed by siphoning water over gills from incurrent siphon to excurrent siphon
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What kind of animals are in class Cephalopoda?
- Squid, octopus, Nautilus
- Possess cuttlebone
- Only animals other than vertebrates with lens eye
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What animal is in class Oligochaeta?
Earthworm
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What kind of animals are in phylum Arthropoda? What are their key characteristics?
- Crustaceans, chelicerates, centipedes/millipedes, insects
- Segmented bodies
- Exoskeleton
- Jointed appendages
- Open circulatory system
- Compound eyes
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What kind of animals are in subphylum Chelicerata?
- Spiders, scorpians, and horseshoe crabs.
- Use chelicerae to eat
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What animal is in class Merostomata?
Horseshoe crab
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What animals are in Phylum Echinodermata? What are their key characteristics?
- Sea stars, sea urchins, sand dollars, sea cucumbers
- Deuterostomes with radially symmetrical adult bodies
- Endoskeleton
- Able to regenerate lost body parts
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What animals are in phylum Chordata? What are their key characteristics?
- Mammals, fish, reptiles, birds, amphibians
- Notochord
- Dorsal hollow nerve cord
- Pharyngeal gill slits
- Post-anal tail
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Class Reptilia
- Amniotic egg
- Dry skin
- Thoracic breathing
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What animals are in Order Chelonia?
Turtles, tortoises, terrapins
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What is the reproductive structure found in birds and reptiles?
Cloaca
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