Concept explainers
To explain: The logic that phylogeny uses shared derived characters for the establishment of an evolutionary relationship.
Concept introduction:
The construction of a phylogenetic tree is based on the shared characters among organisms. A shared ancestral character is one that has originated in an ancestor of the group. The character is shared by all members of the group descending from it. A group of species constitutes a clade that shares a common character. This character is unique to that clade. So, different characters will emerge during evolution and will form a new clade and character will pass to their descendant. Shared derived characters are features that have not originated in ancestor but present in their descendants.
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CUSTOM BIOLOGY
- Use examples to describe some applications of phylogeny.arrow_forwardExplain what the statement, "All phylogenies are hypotheses" means? Include a brief explanation about the types of data involved in making phylogenies.arrow_forwardExplain what a phylogeny tree and what the nodes on it represent and why it is useful to biologists.arrow_forward
- Explain how phylogenetic trees are interpreted and created. Explain what types of traitsare used and some of the difficulties associated with reconstructing phylogenetichistories.arrow_forwardConstruct a phylogeny in the form of a simple cladogram with the ten candies shown on slide A. The tree must include synapomorphies. Once your tree is compete, make another one incorporating the new “taxa” on slide B.barrow_forwardExplain the concept of a molecular clock and its use in dating a phylogenetic tree.arrow_forward
- Describe the process we use to infer the phylogenetic relationships of a set of living organisms.arrow_forwardWhat is the value of derived traits for the reconstruction of phylogenies?arrow_forwardDescribe the difference between homologous and analogous similarities, and how you can tell if a similarity is homologous or analogous using a phylogenyarrow_forward
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