What can lead to new characteristic in an organism?

a. spontaneous generation
b. mutations
c. enzymes
d. mitosis

I know someone already answered but in case you wanted to be sure yes it is mutations

1st let me tell you the similarities cells have organelles that have similar functions to human organs usually when we think of a nucleus we also think of the brain the main reason that is is because the nucleus directs cell activity just like how the brain controls the body's activities another example is how the cell walls main function is to give cell its structure the same as how the skeleton gives its shape to human body Cell organelles function and human organ functions