(Solved): 4 Question 16 Natural selection is: species that have died out and no longer exist the principle mec ...

4 Question 16 Natural selection is: species that have died out and no longer exist the principle mechanism behind evolutionary change in the biosphere structures built from layer after layer of muddy sediment trapped in mats of bacteria remains and indications of former life that are preserved in rocks an advantageous trait that helps an organism live longer