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.
Speciation from a single ancestor in the same geographic region. Define sympatric speciation. Sympatric speciation occurs in situations where the populations undergoing speciation are not isolated by a geographic barrier. The two or more species produced by sympatric speciation overlap in their geographic ranges. Reproductive isolation prevents interbreeding even though there is opportunity to freely mate.