An animal is a vertebrate. it is warm-blooded and has feathers on its body. which class does it belong to? reptilia aves mammalia

Aves

Birds are warm blooded and have feathers

Mammalia's are warm blooded but have hair that cover the body

Reptilia's are cold blooded and their bodies are usually covered in scales.  

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a- all cells come from pre-existing cells

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.