Evolutionists' efforts to account for the origin of species in terms of transition from water to land, and from land to the air, require wide-ranging changes. Consider, for instance, how a fish emerging from water might adapt to dry land. Unless it undergoes rapid changes in its respiratory system, excretory mechanism and skeletal structure, it will inevitably die. A series of mutations must immediately endow the fish with lungs, elongate its fins into feet, bestow kidneys on it, and give its skin a water-retaining property. It is essential that this entire string of mutations takes place within the lifespan of only a single animal.
No evolutionist biologist proposes such a chain of mutations, since the idea is too nonsensical and illogical. Instead, they refer to the concept of pre-adaptation. By this, they mean is that fish underwent changes necessary for them to live on land while they were still living in water. According to this theory, a fish acquired features that would permit it to live on land while it had no need of them. Then when it was ready, it emerged onto dry land to begin living there.
Yet even within the theory of evolution's own hypotheses, there is no logic to such a scenario. A sea creature acquiring features suitable for dry land gives it no advantage. Therefore, there is no logic for claiming that these "just in case" features emerged by means of natural selection. On the contrary, a living thing undergoing pre-adaptation should be eliminated by means of natural selection, since as it acquires features appropriate to the land, it will be progressively disadvantaged.