Question

The wing of bird used as ___________ in initial stage of evolution. ( fill the blank)​

Answer 1

The wing of birds uses as flapping in initial stage of evolution.

Explanation:

Avain flight originates from modification in forelimb which provides down force and enable them to run up to the steep slopes which generates aerodynamic flight for example saving themselves from predators.

They use wing associated incline day by day and thus gives them strength to increase locomotion.

The wing associated incline was generated in growing birds and slowly develops stroking of wings for flight.

This lift is responsible for acceleration that is generated in their body and thus it leads to flight as they birds became mature.