Multiple Choice
In a phylogenetic tree, where would you expect to find the organism that has evolved most recently?
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25. Phylogeny
Introduction to Phylogeny
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Which best describes a branch point in a phylogenetic tree?
A
A point representing the extinction of a species
B
A point where two lineages diverge from a common ancestor
C
A point where a single lineage continues without divergence
D
A point indicating the end of a phylogenetic tree
Verified step by step guidance1
Understand the concept of a phylogenetic tree: A phylogenetic tree is a diagram that represents evolutionary relationships among various biological species or entities based upon similarities and differences in their physical or genetic characteristics.
Identify the significance of a branch point: In a phylogenetic tree, a branch point, also known as a node, represents a common ancestor from which two or more lineages diverge.
Differentiate between the options: Analyze each option to determine which one accurately describes a branch point. A branch point is not where a species goes extinct, nor is it where a single lineage continues without divergence. It is also not the end of the tree.
Focus on the correct description: A branch point is specifically where two lineages diverge from a common ancestor, indicating a speciation event or evolutionary divergence.
Visualize the concept: Imagine a tree structure where branches split from nodes, each node representing a divergence point where lineages separate, reflecting evolutionary paths.
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