ASU Home My ASU Colleges & Schools Map &Locations; Organizations Help QUESTION 1
ID: 303318 • Letter: A
Question
ASU Home My ASU Colleges & Schools Map &Locations; Organizations Help QUESTION 12 Which of the following statements is correct regarding the evolution of flight? O The evolution of feathers on wings was initially to support fight in non-avian dinosaurs O The bottom-up theory postulates that the evolution of flight started with the use of wings to glide from branch to branch. OThe top-down theory postulates that the evolution of flight started with flapping to aid in generating lft off the ground. The wing-assisted incline running theory postulates that wings were initially used to maintain balance while climbing up slopes. QUESTION 13 Which of the following is an example of organ reduction that most birds have?Explanation / Answer
The last answer is correct as the wing-assisted incline running theory postulates that wings were initially used to maintain balance and provided upthrust while climbing steep slopes to reach a higher ground. Hind limbs were, however, the primary organs of propulsion on the horizontal ground which was assisted by wings on steeper slopes.
Rest all the statements(1,2,3) are wrong.