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.
Foliage height diversity and bird species diversity (data from MacArthur and MacArthur 1961).
The amino acid sequences of whale myoglobin and the α and β chains of human hemoglobin
The Human Ear
Language is the basis of human culture around the world. The past decade has seen major developments ...
Structures of human DNA polymerase g (left) and T7 phage DNA polymerase (right) holoenzymes
Smallpox Virus