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13 Cards in this Set
- Front
- Back
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Life originated on earth |
3.6 billion years ago |
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classification |
Grouping of organisms into different level based on their common characteristics |
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Uses of classification of organisms |
· Easy to study about organisms ·Ablity to identify specific distinguishable characteristics of a given organism · Ability to reveal relationships between different groups of organisms |
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First scientific classification of organisms by |
Aritotle 4th bc |
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Introduced a successful classification |
Carlos Linnaeus 18th bc |
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Characteristics of artificial classification |
*Absence or presence of locomotive appendages of organisms and habitats *does depict the evolutionary relationship among organisms |
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Characteristics of natural classification. |
* depicts evolutionary relationships among organisms *cytological,morphological,physiological,molecular biological features of organisms are considered *explains natural relationship among organisms of the same species *explains evolutionary relationship among organisms.
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Modern classification with domains are introduced by |
Carl woese |
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Domains |
*domain archaea *domain bacteria *domain eukarya |
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Domain archaea |
*prokaryotes *able to live in hostile environments *not sensitive to antibiotics Ex- methanogens,halophiles |
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Domain bacteria |
*prokaryotes *sensitive to antibiotics *sometimes pathogenic *most abundant group of organisms Ex- cyanobacteria,bacteria |
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Harmful effects of bacteria |
*Food spoilage * decomposition of dead bodies and structures * cause diseases ex- diarrhoea,leprosy |
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Domain eukarya |
*most prominent organisms with a eukaryotic cellular organism. *have the ability to live in different environments *not sensitive to antibiotics ............ Four kingdoms belong to this domain *kingdom protista *kingdom fungi *kingdom fungi |
