Swine are vulnerable to infection by bird flu virus and human flu virus, which can both be present in an individual pig at the same time. When this occurs, it is possible for genes from bird flu virus and human flu virus to be combined, thereby producing a genetically distinctive virus, which can subsequently cause widespread disease.
The production of new types of flu virus in the manner described above is most similar to the phenomenon of
A) bottleneck effect.
B) founder effect.
C) natural selection.
D) gene flow.
E) sexual selection.
human
Bulging Eyes Of The Tarsier Provide Insight Into Evolution Of Human Vision
Infection transmission
Human infants are like all other placental mammals, except they are born at a less developed state.
Opener Spectral karyotyping of human chromosomes
Human embryo at successive stages of development (not to scale).