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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Chapter 26 Solutions
PEARSON ETEXT FOR CAMPBELL BIOLOGY
- Explain 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_forwardDraw a phylogeny for the species mark the differences between the taxa on the tree.arrow_forward
- When reconstructing phylogenies, is it more useful to compare orthologous or paralogous genes? Explain.arrow_forwardUse UPGMA to reconstruct a phylogenetic tree using the following distance matrix:arrow_forwardExplain how phylogenetic trees are interpreted and created. Explain what types of traitsare used and some of the difficulties associated with reconstructing phylogenetichistories.arrow_forward
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