Treatment. There's currently no cure for Parkinson's disease, but treatments are available to help relieve the symptoms and maintain your quality of life. These treatments include: supportive therapies â such as physiotherapy ; medication ; surgery (for some people)
Reinforcement is a necessary requirement for both the parapatric and sympatric theories of speciation. It is the process by which a hybrid zone (an area of contact between different forms of a species) develops into a full species barrier.
Lesson Summary. Though not common, sympatric speciation is an important evolutionary process that can separate a species into two new ones. This is a relatively uncommon form of speciation, though it has been observed in hawthorn flies and orcas.ympatric speciation occurs if interactions are so limited between these groups that mating no longer occurs between them. Each new population of flies will have genetic variation in its gene pool, which is the collective genetic information for the group.