Statement I: Analogous organs are the result of convergent evolution.
Statement II: Insect wing and bird wing are homologous organs.
Statement III: The marsupials in Australia and South America are examples of parallel evolution.
The process of convergent evolution starts off with two or more unrelated groups getting adapted to a similar environment. By this, they develop more or less similar features, which include analogous organs, i.e., unrelated ancestors “converge” towards the same function while adapting to a similar environment. The wings of insects and birds are examples of this. Although they belong to unrelated taxonomic groups, they have both developed wings for flight. The marsupials in Australia and South America are a good example of parallel evolution. When the ancient landmasses of Laurasia and Gondwana broke apart to form separate continents, the marsupials were also divided into two groups. While one group of marsupials was isolated on the Australian island, the other group remained in South America. Thereafter, the marsupials on both these continents evolved in a parallel manner.