Scientists say that the gene sequence is"___", meaning that it stayed
essentially the same over a very long period of time.

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.

i believe the correct answer is d

maritime tropical may be your answer.

bacterium is not correct