From which of the following do birds get thrust (forward motion) and lift (upward motion)?

Options :
  1. air sacs
  2. flapping of wings
  3. twisting of feathers
  4. shape of wings which is similar to aeroplane blades

Answer and Explanation :-

Answer: Option 2


Sorry there is no explanation for this answer. Please help others by posting your response below

How do you rate this queston?  Very Easy  Easy  Average  Above Average  Tough

Previous Question : Birds are less sensitive to temporary deprivation of water, when compared to the mammals, because

Next Question : Among the following mammals, which one lays eggs?

Click here for free online test on General Science


 (Getemail alerts when others member replies)

Dogs are great. Bad dogs, if you can really call them that, are perhaps the greatest of them all.
-John Grogan Marley and Me: Life and Love With the World's Worst Dog