Which came first, the chicken or the egg? This question is known as a causality dilemma which illustrates the impossibility of biological evolution. But this is not the only causality dilemma which exists for the theory of evolution. Here are some others:
Did DNA come first or did cell membranes come first which are necessary for cellular life?
Did DNA come first or did DNA replication, synthesis, and transcription come first which are necessary for life?
Did DNA come first or did DNA’s ability to repair itself come first?
Did the cell come first or did the nucleus and DNA come first?
Did male sexual reproduction come first or did female sexual reproduction come first?
Did blood come first or did blood clotting come first which is necessary for survival?
Did the E. coli bacteria come first or did the bacterial flagellum come first?
Did animals come first or did the eye come first?
Did butterflies come first or did caterpillars and metamorphosis come first which results in butterflies who alone are able to sexually reproduce unlike caterpillars?
Did bees come first or did royal jelly proteins come first which are necessary to make queen bees?
Because both of these could not exist without the other, both of them had to come into existence at roughly the same time. But this requires a creator and atheists do not want to accept the consequences of belief in a personal God. Hence, in an atheist worldview, we are reduced to absurdity and end up fighting against science itself.