SSC General Science & Technology Sample Paper NCERT Sample Paper-2

  • question_answer
    Bats can fly in the dark because

    A)  They have a better vision in the dark

    B)  Any bird can be do so

    C)  They are guided by ultrasonic waves produced by them

    D)  The pupils of their eye- are very big

    Correct Answer: C

    Solution :

    [c] Humans can typically hear sounds up to about 20,000 Hertz, (Hz) while most bat echolocation sounds are 30,000 Hz or more, and some bats go as high as 200,000 Hz. Bats are not the only animals to use such ultrasound, as it is found in many rodents in addition to some birds and frogs. However, bats seem to be the masters of using their sonar system to navigate and capture prey.

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