Species separated by inability of hybrid offspring to produce offspring of their own

clinically, some people often have repeated allergies, eczema and respiratory infections or other parts of the infection, in this case, in addition to some routine tests such as tests for white blood cells, immunoglobulin series, lymphocyte subsets, etc., the five immune immunoglobulin tests are also necessary.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.