Conservation biologists define a region as a biodiversity hotspot if ________.
there is at least one umbrella species to be protected there is an unusually large number of endemic species thriving species richness is unusually high and protection is required there is an unusually large number of endemic species threatened by humans there is an endemic species protected by a captive breeding program
Conservation biologists define a region as a biodiversity hotspot if there is an unusually large number of endemic species threatened by humans. This definition typically requires that a region must have at least 1,500 species of vascular plants as endemics and must have lost at least 70% of its original habitat.