When we scientists say two species are more closely related, another way of saying it is they share a Response area common ancestor.

This means that at some point in the past, these two species diverged from a single common ancestor, and therefore share more similar genetic and evolutionary history compared to species that are less closely related. The closer the relationship between two species, the more recent their common ancestor would have been. This concept is crucial in understanding the evolutionary relationships between different organisms and can provide insights into their genetic similarities and differences.