<P> A cladogram (from Greek clados "branch" and gramma "character") is a diagram used in cladistics to show relations among organisms . A cladogram is not, however, an evolutionary tree because it does not show how ancestors are related to descendants, nor does it show how much they have changed; many evolutionary trees can be inferred from a single cladogram . A cladogram uses lines that branch off in different directions ending at a clade, a groups of organisms with a last common ancestor . There are many shapes of cladograms but they all have lines that branch off from other lines . The lines can be traced back to where they branch off . These branching off points represent a hypothetical ancestor (not an actual entity) which can be inferred to exhibit the traits shared among the terminal taxa above it . This hypothetical ancestor might then provide clues about the order of evolution of various features, adaptation, and other evolutionary narratives about ancestors . Although traditionally such cladograms were generated largely on the basis of morphological characters, DNA and RNA sequencing data and computational phylogenetics are now very commonly used in the generation of cladograms, either on their own or in combination with morphology . </P> <Table> <Tr> <Td> </Td> <Td> This section needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (April 2016) (Learn how and when to remove this template message) </Td> </Tr> </Table>

How does a cladogram show the relationship among organisms
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