Question #cb7b0
1 Answer
Sympatric (speciation without physical barriers) and allopatric speciation (with physical barriers)
Explanation:
Species that are separated by a physical barrier (such as a river, mountain range, inhospitable desert, etc.) are geographically isolated. The Salamander migration of Southern California along two separate routes is a good example of this process in action. enter link description here
Species without physical barriers can nonetheless be divided into separate groups that evolve independently, one reason would be temporal isolation - for example when the mating seasons no longer overlap in separate populations of frog or when a flower only open at a specific time of day.
Behavioral isolation, such as specific mating calls or foraging behavior can also result in speciation.
