BotanyLong bones with air cavities and lungs with air sacs are the features which of the following class?

Long bones with air cavities and lungs with air sacs are the features which of the following class?

  1. A

    Amphibia
     

  2. B

    Mammalia
     

  3. C

    Reptilia
     

  4. D

    Aves

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    Solution:

    Concept: Long bones with air cavities and lungs with air sacs are the features of class Aves. Aves include birds of flying vertebrates. The main characteristic is the presence of feathers.
    Hence, option 4 is correct.

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