Classification Systems
- Created by: Tasha.L
- Created on: 10-05-16 14:17
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- Classification systems
- Phylogenic - reflecting evolutionary relatedness.
- Phylogenic classification is when closely related organisms are placed into the same group.
- Organisms in the same group have a more recent common ancestor with each other than with those in a different group.
- Classification is hierarchical: larger groups divide into smaller groups.
- Any group within a system of classification is called a taxon.
- Plural: taxa
- Largest taxon = Domains. The three domains split into sub groups called kingdoms.
- 1st and 2nd Domain: Eubacteria and Archaea
- These split into the kingdom prokaryota.
- 3rd Domain: Eukaryota
- These split into the kingdoms plantae, animalia, protoctista and fungi.
- 1st and 2nd Domain: Eubacteria and Archaea
- DOMAIN, Kingdom, Phylum, Class,Order, Family, Genus, species.
- Classification systems are discrete: at any level of classification, a species will belong to one taxon only.
- Why do we need a classification system?
- It is universal and so allows for more effective communication.
- The Binomial system is a universal, unique system of naming that consists of two parts: the genus and the species.
- It is unambiguous.
- It is understood all over the world.
- It suggests that two organisms that share the same part in their name are closely related.
- E.G .Panthera tigris (tiger) and Panthera leo (lion).
- The Binomial system is a universal, unique system of naming that consists of two parts: the genus and the species.
- Phylogenic classification means that we can infer the relatedness of organisms.
- If a new species is discovered we can use classification systems to predict some of its features.
- It is easier to count families rather than species when determining the health of an ecosystem.
- It is universal and so allows for more effective communication.
- Classification is tentative.
- It is not fixed or certain.
- The Binomial system is a universal, unique system of naming that consists of two parts: the genus and the species.
- It is unambiguous.
- It is understood all over the world.
- It suggests that two organisms that share the same part in their name are closely related.
- E.G .Panthera tigris (tiger) and Panthera leo (lion).
- Phylogenic - reflecting evolutionary relatedness.
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