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.
This is why speciation is considered to be a macroevolutionary process, as it involves the divergence of a new phylogenetic line (i.e. a new species) from an existing one. This is also why the post on macroevolution on my blog includes examples of speciation as macroevolution.