PIMSO 2023 - Science - Senior Secondary - National Round Question 6
PIMSO Science · PIMSO 2023 - Science - Senior Secondary - National Round
The following image shows the phylogenetic tree of influenza viruses (right) and their animal hosts (left). What could be inferred about the evolutionary history between influenza viruses and their animal hosts? Reference: Shi M, Lin XD, Chen X, Tian JH, Chen LJ, Li K, Wang W, Eden JS, Shen JJ, Liu L, Holmes EC. Nature. 2018 Apr 12;556(7700):197-202.

Influenza viral infection were passed on through different generations
Influenza viruses evolved together with their animal hosts
Influenza viruses switched animal hosts through the course of evolution
Influenza viruses reinfected mammals in different time points of evolution
None of the above