Q.
The structural adaptations observed in placental mice in North America are very similar in appearance to marsupial mice in Australia. It is an example of which one?
The observation that placental mice in North America are very similar in appearance to marsupial mice in Australia. Even though they are not closely related to one another, it is an example of convergent or parallel evolution. [In evolutionary biology, convergent evolution is the process whereby organisms not closely related (not monophyletic), independently evolve similar traits as a result of having to adapt to similar environments or ecological niches].