Solution Found!
Simplifying Phylogenetic Trees: Parsimony & Evolutionary Change
Chapter 26, Problem 2(choose chapter or problem)
To apply parsimony to constructing a phylogenetic tree,
a. choose the tree that assumes all evolutionary changes are equally probable.
b. choose the tree in which the branch points are based on as many shared derived characters as possible.
c. choose the tree that represents the fewest evolutionary changes, in either DNA sequences or morphology.
d. choose the tree with the fewest branch points.
Questions & Answers
QUESTION:
To apply parsimony to constructing a phylogenetic tree,
a. choose the tree that assumes all evolutionary changes are equally probable.
b. choose the tree in which the branch points are based on as many shared derived characters as possible.
c. choose the tree that represents the fewest evolutionary changes, in either DNA sequences or morphology.
d. choose the tree with the fewest branch points.
ANSWER:
Step 1 of 2
The principle of parsimony prompts us to select the least complex scientific explanation that aligns with available evidence. This means we lean towards simplicity over complexity.
Option (a) indicates picking a tree that treats every evolutionary shift as equally likely. While this is a basic approach, it might not capture the multifaceted nature of evolution. In practice, evolutionary changes don't occur uniformly. Varying traits can evolve at diverse speeds across species, implying option (a) may be an oversimplification.
Option (b) recommends opting for the tree that factors in the maximum number of shared evolved features. This approach offers a more granulated insight into evolutionary pathways. However, while it presents an intricate picture, it may not always align with the principle of parsimony. Sometimes, added detail can equate to increased complexity rather than a simpler explanation.
Watch The Answer!
Simplifying Phylogenetic Trees: Parsimony & Evolutionary Change
Want To Learn More? To watch the entire video and ALL of the videos in the series:
Explore the application of parsimony in constructing phylogenetic trees, emphasizing simplicity in scientific explanations and its relation to evolutionary changes. Learn about various options for tree construction and the core concept of choosing the most parsimonious representation