An ecologist observes similarities between a species of bear in north america and a species of bear in asia. which is the most likely reason that these two species have similar physical characteristics?
1. bear species have same degree of similarity no matter where found.
2. the two species are part of same community.
3. migrating members of the two species breed with one another.
4. the species have adaptions that allow them to live in the same type of biome.