Which of the following are produced by the wings of bats, making them able to fly in dark?

Options :
  1. sound waves
  2. ultrasonic waves
  3. infra-red rays
  4. ultraviolet rays

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 : Among the following animals which one is cold-blooded?

Next Question : In which of the following ways does earthworm increase the fertility of soil?

Click here for free online test on General Science


 (Getemail alerts when others member replies)

For those who know the value of and exquisite taste of solitary freedom (for one is only free when alone), the act of leaving is the bravest and most beautiful of all.
-Isabelle Eberhardt The Nomad: The Diaries of Isabelle Eberhardt