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18 Cards in this Set
- Front
- Back
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What is a dichotomous key?
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A dichomtomous key is a tool used by scientists to determine the identity of unknown organisms
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What is the structure of the dichotomous key?
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Series of paired statements. Statements describes the organisms physical characteristics. Total number of steps is one less than the total number of species. Each pair of statements are mutully exclusive.
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Classification
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Is important to scientists because it helps to do work with different types of subjects
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How does the degree of similarity between the organisms change as you go through each level?
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All of the subjects become more similar
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What kinds of characteristics or attributes are mist useful/helpful when creating a classification system?
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The size and color because you can see it
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How many levels of classification are recognized by scientists?
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8 main levels
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What is another word for the groups or levels of classification?
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Taxa
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Domains are the least specific/most inclusive level of classification. How many domains are there?
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Eukarya, bacteria, archeaebacteria
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What taxa is directly below domains? How many are there?
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A kingdom is directly below domains. Six; animals, plants, fungi, protists, eubacteria, and archaebacterial
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The smallest level of classification is the species. What is the biological definition of a species?
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Any two organisms that can breed, and produce babies
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Why are scientific names in Latin?
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Because the organisms names are different around the world so the Latin names ensures that we know what we are talking about
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Taxonomy
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The scientific study of how organisms are classified
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Levels of classification
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Domain, kingdom, phylum, class, order, family, genus, species
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Carolus Linnaeus
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1707-1778 Swedish botanist, physician, zoologist Created a system of naming organisms that is still used today |
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The naming system of Linnaeus
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Each species has a two-part name. This naming system is called binomial nomenclature.
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Binomial nomenclature
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The first name is the genus and the second name is the species
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Binomial nomenclature
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Always underlined or italicized. The first letter of the genus name is always capitalized.
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Binomial nomenclature
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All other letters are lowercase. Written in Latin
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