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21 Cards in this Set
- Front
- Back
Characteristics of Monera (6)
examples |
-single celled prokaryotes w/no internal membranes
-no nucleus, chloroplasts, mitochondra -both anaerobes and aerobes -virus in here for lack of better place -archea is sometimes included -one circular chromosome ex: blue-green algae, bacteria |
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Characteristics of Protista (5)
three examples |
-widest diversity but all eukaryotes
-single celled or primitive multicelled -either anaerobes or aerobes -both heterotrophs and autotrophs -organisms that dont fit in plant or fungi (seaweed, slime molds) -classified by movement ex: euglena, paramecium, amoeba |
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Euglena
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protist
-chlorophyll for photosynthesis, -red eye spot, -primarily autotrophic -move by flagella |
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Amoeba, Paramecium
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protists
heterotrophs amoeba=moves by pseudopods paramecium=flagellum |
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Characteristics of Fungi (4)
examples |
-eukaryotic heterotrophs
-secrete hydrolytic enzymes outside the organism for extracellular digestion and then absorbs small nutrients -decomposers -cell walls of chitin ex: mushrooms, yeast, mold, athlete's foot fungus |
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Characteristics of Plants (2)
examples |
-all are autotrophic eukaryotes
-vascular=tracheophytes; no vascular=bryophytes ex: mosses, ferns, cone-bearing and flowering plants |
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Characteristics of Animals (6)
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-all multicellular heterotrophic EUks
-9 main phyla: proifera, cnidaria, platyhelminthes, nematoda, annelida, mollusca, arthropoda, echinodermata, chordata -sexually reproduce with dominant diploid stage -usually smaller flagellated sperm fertilizes larger, nonmotile egg -monophyletic (one common ancestor) -classified based on: homologous structures and embryonic development |
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two diploblastic animal phyla
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porifera, cnidarians
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animal acoelomates
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porifera
cnidaria platyhelminthes |
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animal pseudocoelomate
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nematodes (acts as hydrostatic skeleton)
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Porifera
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SPONGES
no symmetry sessile; no nerves or muscles central cavity=spongoceol diploblastic three types of cells in place of tissues: -choanocytes, spicules, amoebocytes -evolved from colonial organisms -asexual and sexual reproduction (HERMAPHRODITES) |
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Cnidarians
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HYDRA AND JELLYFISH
-radial symmetry -body shape: polyp (vase) or medusa (upside down bowl) -gastrovascular cavity where extracellular digestion occurs -also intracellular digestion in lysosomes of cells -life cycle: sometimes larva, then asexual polyp then sexual medusa -CNIDOCYTES: stinging cells |
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Platyhelminthes
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FLATWORMS: TAPEWORMS
-simplest animal that is triploblastic, bilaterally symetrical, and an anterior end aka a head -one ended digestive cavity: digestion cannot occur continuously -true tissues, organs -are acoelmates and have a solid body so no room for respiration, circulation of food, etc -adaptions: flat body= cells in direct contact with environment; digestive cavity=branched so the whole body can get food |
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Nematodal
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ROUNDWORMS
-unsegmented, bilateral symmetry, little sensory development -pseudocoelomate transports nutrients but has no room for circulatory system -protostome coelomates (blastopore forms mouth, not anaus) -Trichinella=trichinosis from uncooked pork -Caenorhabditis elegans=model for studying link between genes and development |
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Annelida
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SEGMENTED WORMS: EARTHWORMS, LEECHES
-protostome coelomates with little sensory development -digestive tract: tube within a tube: crop, gizzard, intestine -closed circulatory system (5 pairs of aortic arches) -blood has hemoglobin and oxygen -diffusion of respiratory gases through moist skin -hermaphrodites, but don't self fertilize |
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Mollusca
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SQUIDS OCTUPUSES SLUGS CLAM SNAILS
-protostome coelomates -RADULA: tooth-bearing structure that acts like a tongue -open circulatory system: hemocoels=blood filled spaces -most have gills, nephridia -soft body often with hard calcium shell -body zones: HEADFOOT-sensory, motor VISCERAL MASS: organs of digestion, excretion, reproduction MANTLE: surrounds visceral, secretes shell |
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Arthropoda
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INSECTS (grasshoppers) CRUSTACEANS (shrimps, crbas) and ARACHNIDS
-protostome coelomates -jointed appendages -head, thorax, abdomen segmented -open circulatory: tubular heart, hemocoels -trachea air ducts brings respiratory gases into hemocoel -excretion through malphigian tubules (uric acid) -more sensory movement than annelids=more speed and freedom of movement -chitinous exoskeletons -some have book lungs, book gills |
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Echinodermata
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SEA STARS and SEA URCHINS
-deuterostomes -intially bilateral but becomes radial as adult because of sessile lifestyle -water vascular system=hydrostatic support especially in locomotive tube feet -external fertalization (sex reproduction) -also by fragmentation and regeneration -sea stars=calcium plated exoskeleton |
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Chordata
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FISHES, AMPHIBIANS, REPTILES, BIRDS, MAMMALS
-deuterostome coelomates -NOTOCHORD: flexible rod that extends length of the body -dorsal, hollow nerve cord -tail (movement and balance--coccyx bone in humans) -birds, mammals=homeotherms--constant body temp -everyone else=pokilotherms (cold blooded); some reptiles are endotherms |
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Characteristics of Mammals (4)
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-mothers nourish with milk
-hair or fur of keratin -homeotherms -either placental, marsupial, or monotreme |
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Characteristics of Primates
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-dextrous hands with opposable thumbs
-nails -eyes face front; close together -long period of nurturing young |