The organism that causes flu is the influenza virus. It belongs to the family Orthomyxoviridae and they are included in Group V of the Baltimore classification, consisting in negative sense, single-stranded RNA viruses. Within this family there are […]
In 1981 the Center for Disease Control and Prevention (CDC) of the United States reported the existence of anunexplained pneumonia and Kaposi’s sarcoma by Pneumocystis jiroveci in previously healthy homosexual men from Los Angeles and New York. This represented […]
In biology few issues are as basic as the division and classification of living things. Despite the differences shown by taxa that occupy each of the categories, all living things have a common ancestor and characteristics that unite them.