A reporter construct in which the green fluorescent protein (GFP) gene is fused to gene X is best used to .

They both determine the exact age of rocks.

They must use the scientific method

Are you asking about a street map usage  if so here is your answer  a street map for a very limited area could simply be a bit map or a .jpg image.  but a more general map would probably store the streets as vectors.  but you shouldn't assume that there is one way to do it