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Ryan Ch. 1

Classifying Organisms

TermDefinition
bacteria small, single-celled organisms with no nucleus
dichotomous key tool used to classify organisms based on two characteristics
fungi kingdom of organisms with a nucleus that get nutrients by decomposing other organisms
kingdom highest level of biological classification
protist kingdom of singel-celled or multicellular organisms that may have characteristics of both plants and animals
protozoa animal-like protist
angiosperm vascular plants that produce seeds from flowers
gymnosperm vascular plants that produce seeds but not flowers
nonvascular plants lacking a water-transport system
vascular plants having a water-transport system
amphibians vertebrates with smooth mosit skin that begin life in water but live part of the time on land
cnidarians invertebrates with radial symmetry, a saclike body, a true mouth, and the ability to digest food
invertebrates animals without a backbone
symmetry matching form on opposite sides of a dividing line
vertebrates animals with a backbone
animal multicellular, require oxygen, eat food, mobile, reproduce sexually
plant multicellular, have tissues and organs, have cell walls and chloroplasts, and make their own food
4 types of gymnosperms conifers, cycads, ginkgos,gnetophytes
bilateral symmetry a line of symmetry with two identical parts
radial symmetry lines of symmetry that are arranged around a middle point
arthropods have jointed parts, exoskeleton, contain the most species
mollusks soft bodied invertebrate
echinoderms invertebrates with spiny skin
sponges invertebrates that lack tissues, organs and symmetry
fish lay eggs, have gills, bony skeleton
reptiles tough outer skin, lay eggs, scaly waterproof skin
birds have beaks--no teeth, lay eggs, most have feathers, feed babies what they catch
mammals have hair, feed babies milk, have teeth, move to find food
Created by: jryan
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