Something that can be observed, measured or changed without altering the identity of a substance is called a(n) property.

physical
observable
chemical
changeable

the correct answer is:

a population changes in response to a change in the environment.

emerging idea only occurs as a raw idea that could appear out of nowhere. meanwhile, to reach scientific consensus , that idea must be structured and tested over and over again through various experiments. the scientific consensus transforms the raw idea into idea that is more reliable through the process of scientific elimination.

answer; motor (efferent)neurons;