Question
Name the class in which:
- Syrinx is present.
- Pneumatic bones are present.
Name the class in which:
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Explain why mule is not considered as species?

A stone and the earth attract each other with an equal and opposite force. Why then we see only the stone falling towards the earth but not the earth rising towards the stone?
State whether the following objects possess kinetic energy, potential energy, or both:
Give an example for production of transverse wave.