On a phylogenetic tree, one can determine how closely related two species are byMultiple choice question.counting the number of species between them at the top of the treelooking at how recently they share a common ancestorconsidering whether they are morphologically similar to one another
Question
On a phylogenetic tree, one can determine how closely related two species are byMultiple choice question.counting the number of species between them at the top of the treelooking at how recently they share a common ancestorconsidering whether they are morphologically similar to one another
Solution
The correct answer is: looking at how recently they share a common ancestor.
In a phylogenetic tree, the relatedness of two species is determined by their most recent common ancestor. The closer the common ancestor is to them on the tree, the more closely related the species are. This is because they have a more recent common history and likely share more genetic material.
Counting the number of species between them at the top of the tree or considering whether they are morphologically similar to one another does not necessarily indicate how closely related two species are. Morphological similarity can sometimes be misleading due to phenomena like convergent evolution, where unrelated species evolve similar traits due to similar environmental pressures, not because of recent common ancestry.
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