What do you infer from the resemblance between flying squirrel and flying phalanger with reference to their evolution.

Explanation

When more than one adaptive radiation appear to have occurred in an isolated geographical area (representing different habitats), and two or more groups of unrelated animals come to resemble each other for similar mode of life or habitat, it is called convergent evolution.
For example Australian marsupial and placental mammal. Flying squirrel is placental mammal and flying phalanger is Australian marsupial. A variety of placental mammals have evolved which appear similar to a corresponding marsupial.