Sister clades are two groups of organisms that share a common ancestor and are closely related, but diverged into separate evolutionary lineages. They may have different species within each clade, but they are not considered sister species because they are not directly descended from a common ancestor.
On the other hand, sister species are two species that are each other's closest relatives and are descended from a recent common ancestor. They share a more recent common ancestor than sister clades and are considered to be closely related in terms of evolutionary history. Sister species are typically more closely related than sister clades.
differentiate between sister clades and sister spesies
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