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23 Cards in this Set
- Front
- Back
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What is the largest and most diverse of the kingdoms of living organisms?
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the animal kingdom
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Scientists have named how many species so far?
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2 million species or organisms
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What are the characteristics of animals?
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- multicellular
- heterotrophic - lack cell walls - exhibit motility @ some point |
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How many groups of phyla are there in the animal kingdom?
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30 distinct groups of phyla
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What are the 2 main categories of animals? Describe them.
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1) vertebrates= those with backbones
2)invertebrates=those without a backbone |
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What is a taxonomic flow chart?
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a device used to group organisms based on their similarities and differences
- very similar in its general design to a taxonomic key |
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What is a dichotomous flow chart?
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at each point you will have two choices in which to proceed and the couplets much contrast
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What must you base your chart on?
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only on readily available characteristics
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What percentage of animals are invertebrates/vertebrates?
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97%=invertebrate
3%=vertebrate |
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What are invertebrates supported by then if they have no backbone?
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they are supported either by a hydroskeleton or exoskeleton
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What are Cnidaria?
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(anemones,jellyfish,corals)
- aquatic animals (usually marine) - simple body - radially symmetry - occur in two forms:polyp/medusa |
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What are Platyhelminthes?
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(flatworms)
- more complex invertebrates - bilaterally symmetrical bodies |
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What are Nematoda?
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(roundworms)
- cylindrical worms - free living in nature - well developed organ systems - most feed on decaying plant/animal matter - some are parasitic (heartworms,pinworms) |
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What are Rotifera?
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(rotifers)
- found in fresh water or covering plants in moist environments - complex structure - crown of cilia near the mouth that is used for locomotion and for feeding |
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What are Annelida?
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(segmented worms)
- bodies distinctly segmented - movement more efficient - several well dev. organ systems - include earthworms/leeches |
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What are Arthropoda?
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(insects, arachnids, crustaceans)
- dominant animals on earth today - paired,jointed appendages - rigid exoskeleton - butterflies, spiders, and lobsters |
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What are Mollusca?
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(snails, clams, octopi)
- shelled animals found in marine, aquatic, wet terrestrial habitats - moist, muscular body that includes a mantle - includes slugs, oysters, squid |
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What are Echinodermata?
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(sea stars, sea urchins)
- radially symmetry body - in marine habitats - lack a distinct head region - have tiny suction cups |
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What are Osteichthyes?
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(bony fish)
- largest/most successful group of fishes - vertebrate - found in fresh water/marine environments |
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What are Amphibia?
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(frogs,toads, salamanders)
- can live on land but must return to water for reproduction - dependent on moisture - lay their eggs in water |
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What are Reptilia?
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(turtles, snakes, lizards)
- first amniotes produce amniotic eggs - lay eggs on land - all have horny, proteinaceous scales - 8000 species |
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What are Aves?
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(birds)
- share many characteristics with reptiles - feather covered skin - hollow bones |
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What are Mammalia?
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(egg laying mammals, placental marsupial)
- can be aquatic, marine or terrestrial - 3 middle ear bones, milk produced in mammary glands, hair - platypus, armadillo, kangaroo |
