One difference between human cheek cells and onion cells is the presence of cytoplasm the absence of a nucleus in the onion cells the absence of a cell wall in cheek cells none of the above

c

explanation:

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy