The following figure shows two possible groups of species on

The following figure shows two possible groups of species on which to focus conservation efforts. Why might you choose a conservation strategy that would save the two species in blue rather than the three species in red? Saving two closely related species preserves more phylogenetic history than saving three more distantly related species. Saving the blue species preserves more phylogenetic diversity. The blue species are easier to preserve because they have not evolved as much as the red species. The red species are not important to the ecology of their habitat.

Solution

Saving the blue species preserves more phylogenetic diversity.

Long brances mean very long evolution. Those species evilved in such a way that they have their iwn niche and can be easily conserved. Short branches means closely related species and less genetic diversity.