There is more than one correct way to show relationships using a phylogenetic tree. Three of the four trees displayed below show the same relationship between species A, B, C, D, and E. Which tree shows a different relationship?Tree 1 Tree 2 Tree 3 Tree 4

Question

There is more than one correct way to show relationships using a phylogenetic tree. Three of the four trees displayed below show the same relationship between species A, B, C, D, and E. Which tree shows a different relationship?Tree 1  Tree 2  Tree 3  Tree 4

BlackTom AI · Accepted Answer

To approach this question, I will compare the depicted phylogenetic trees and describe why each option does or does not align with the others.
Option a: 'All of the trees show the same relationships.' If this were true, every tree would arrange A, B, C, D, E identically in terms of shared ancestry and branching order. However, visually Tree 4 appears to place the same taxa in a different branching configuration compared to the others, which contradicts this statement.
Option b: 'Tree 1.' Selecting Tree 1 implies that Tree 1 shares the same relationships as Trees 2 and 3 (the three that are claimed to be equivalent). Yet, if Tree 1 were the one that matches the others, the remaining trees would need to differ, but the prompt indicates three of the four trees show the same relationship and one does not. Thus Tree 1 cannot be the isolated different one if the other three agree.
Option c: 'Tree 3.' Similarly, choosing Tree 3 would peg Tree 3 as the odd one out. The visual evidence shows that Tree 4 deviates from the common pattern shared by the other three, so Tree 3 would not be the tree that shows a different relationship.
Option d: 'Tree 2.' If Tree 2 were the outlier, then Trees 1, 3, and 4 would share a different, common pattern. But the given clue indicates that three trees share the same relationship while one does not, and the distinctive arrangement in Tree 4 points to Tree 4 as the inconsistency rather than Tree 2.
Option e: 'Tree 4.' This choice asserts that Tree 4 is the one that shows a different relationship. Examining all four trees side by side, Tree 4 features a rearrangement of branching order for A, B, C, D, and E that does not match the consistent pattern seen in the other three trees, which indicates it is the outlier.
In summary, the key idea is to identify which tree disrupts the common pattern of relationships among the species. The three trees align with each other in their branching relationships, while Tree 4 presents a distinct configuration that changes the inferred relationships among the species.

There is more than one correct way to show relationships using a phylogenetic tree. Three of the four trees displayed below show the same relationship between species A, B, C, D, and E. Which tree shows a different relationship?Tree 1 Tree 2 Tree 3 Tree 4单项选择题

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