Many religiosts and religious fundamentalists deem the theory of evolution to be a heresy; an offence to God as a Creator; a contradiction of the Bible and scientifically untenable theory. Some religious apologists draw an analogy and compare evolution to a bunch of apes typing on typewriters and coming up with the Encyclopedia Britannica. Such individuals, sadly, have no working knowledge of the mechanisms of evolution.
Evolution is enabled by means of chemistry and the original makeup of a “chemical soup” of sorts wherein carbon, hydrogen, oxygen and nitrogen formed molecules to make up the four nucleotydes namely Adenine, Cytosine, Guanine and Thiamine known for short as "A," "C" “G” and “T.”
While the earth is believed to be approximately 3 billion years old, it took some billion years more or less for DNA to develop into single celled organisms and hundreds of millions of years for multi-celled organisms, arthropods, worms, cephalopods and insects to evolve.
The organisms with backbones, chordates, including fish, amphibians, reptiles, birds, and mammals developed much more recently.
The big point the naysayers do not understand is that when a certain species exists, and through mutation, a variation is introduced into the population, if that mutation, enhances the ability to live to the point of procreation, that genetic trait, behavior or whatever, will proliferate within the population and tend to take over. Also, as populations of a particular species spreads out into different environments, some become more suited than others to particular environments be they wet, dry, mountainous, cold, rich in organic matter, etc. In this way, Charles Darwin discovered especially in archipelagos that there was adaptive radiation. But the point of natural selection is that once a new trait or feature is added to the population, increased survival value permits that feature to stick" or become a stable part of the population.
Modern scientists have, for instance, "seeded” ten different containers with a specific kind of bacteria and then ran the populations through approximately 35,000 generations. They discovered that all of the populations in all ten containers evolved. But they all evolved differently i.e. in different directions. And all improved (from the standpoint of survival value, complexity and adaptability). But they all improved differently. One of the ten developed the special ability to digest citrates which was deemed an “evolutionary” jump.
The point is that evolution can take place without any “shove," encouragement or incentivizing. Evolution satisfies itself. (Those seeming mistakes in mutations which impair survival, are lost and breeded out of existence for the most part.) But scientists have observed that evolution can often take place very fast, such as fish where the strident coloration which once had survival value, become a hazard, as by making the fish more vulnerable to predators. In such case, the experimenters discovered that the fish quickly evolved into colors that were neutralized and less conspicuous to predators, but in very short Order.
Among other things, evolution is not teleological i.e. not directed in any direction by aim, plan or goal but totally haphazard —as the luck of the draw—with the results “played out” as to whether the mutations had greater or lesser survival value.