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Ryan Ch. 1
Classifying Organisms
| Term | Definition |
|---|---|
| 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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