Answer:
Organisms that are in existence to day must have evolved from Ancestral species million of years ago.
Natural selection is the main driving mechanisms for evolution of new species.
Explanation:
Genreally organisms produce more
offsprings than they can provide for in a particular environment.
Because of thre limited resources available due to overpopulation, organisms must develop certain characteris or traits to survive.
Offisprings that survived must have inherited these traits from thier parents, while those without these traits will die.
Natural selection must be the mechanism for the selected organisms to withstand selection pressure of limited resources.
This is survival of the fittests by natural selection.
