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Classification
6th Grade Science - Classification
Term | Definition |
---|---|
Binomial nomenclature | a two-word naming system for identifying living things |
Eukaryotic | having a nucleus in each of it’s cells |
Invertebrates | a group of organisms without backbones |
Endoskeleton | an internal skeleton |
Exoskeleton | an external skeleton |
Taxonomy | The science of classifying and naming organisms |
Non-vascular plants | plants without true roots, stems, or tubes to carry water and nutrients |
Vertebrates | a group of organisms with backbones |
7 Classification Levels | Kingdom, Phylum, Class, Order, Family, Genus, Species |
Arthropods | Exoskeleton , jointed appendages (crabs, insects) |
Birds and Mammals | Warm-blooded, vertebrates |
Segmented Worms | Earthworms, leeches |
Reptiles | scaly skin and lungs |
Mollusks | soft bodies, invertebrates, ex. squids, snails, slugs |
2 classification levels that make up the Scientific Name | Genus & Species |
Number of body segments for an ARACHNID | 2 |
Number of body segments for an INSECT | 3 |
Number of pairs of legs for an ARACHNID | 4 |
Number of pairs of legs for and INSECT | 3 |
Why is it important to classify organisms? | 1. to identify the wide variety of organisms 2. helps in predicting the characteristics of the organism 3. to understand how living things are connected 4. to identify if the organism is dangerous or not |
Bryophyte | non-vascular, do not have true roots, leaves or stems, 2-5cm in height |
Tracheophytes | vascular, have true roots, leaves, stems and over 5cm in height |
Bryophyte examples | mosses, liverworts, hornworts |
Tracheophyte examples | pine trees, maple trees, daisies |