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Bio II 26
Biology of phylogenteics
| Question | Answer |
|---|---|
| What does a biogenetic tree do? | shows relationships and differences between organisms. |
| Taxonomy | the discipline of naming and classifying organisms based on shared characteristics. |
| Taxon | unit of classification |
| Systematics | classifying organisms based on evolutionary relationships. |
| what does systematics lead to? | leads to phylogeny |
| Phylogeny | Hypothesis of evolutionary history by looking at common ancestors |
| Clade | group of taxa sharing a common ancestor |
| Branch Point | divergence of two or more branches from a common ancestor |
| What is another name for a branch point? | Node |
| What do deeper branches mean? | a more distant common ancestor |
| What do shorter branches mean? | a species developed more recently than a larger one |
| Monophyletic Clade | a common ancestor of all the decendants |
| Paraphyletic Clade | Common ancestor but not all decendants |
| Polyphyletic | A group of taxa that came from different ancestors |
| What are the 4 taxanomic classes: | 1.Amphibia 2.Mammalia 3.Reptilia 4.Aves |
| What is aves? | A taxonomic class that means birds |
| Pleisiomorphs | characteristics that are shared with ancestors |
| Synapomoprhy | Characteristics not shared with acestors or possibly each other, makes the organisms unique |
| Steps to building a phylogeny? | 1. select taxonomic groups and determine what characteristics there has to be. 2. Find an outgroup |
| What is an outgroup? | A group that doesnt contain any of the characteristics that the rest of the group has. |
Created by:
dpwafle0122
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