Because the have hollow bones, feathers, wings, beaks, and they lay eggs
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I'm sorry but you should do it on your own because if you don't you won't learn the way you should and plus that is cheating.
Answer:
Most attenuated vaccines are viral, some are bacterial in nature. Examples include the viral diseases yellow fever, measles, mumps, and rubella, and the bacterial disease typhoid
Explanation:
Hope this helps :)
I think it’s evaporation proton
If we do we can find the weak points in cancer contaminated cells
