Formulate the main provisions of the evolutionary teachings of Charles Darwin.

1. Organisms are changeable. It is difficult to find such a property according to which individuals belonging to a given species would be completely identical.
2. Differences between organisms, at least in part, are inherited.
3. Theoretically, populations of plants and animals tend to multiply exponentially, and theoretically any organism can fill the Earth very quickly. But this does not happen, since vital resources are limited, and the strongest survives in the struggle for existence.
4. As a result of the struggle for existence, natural selection occurs – individuals with useful properties under these conditions survive. Survivors pass on these properties to their offspring, that is, these properties are fixed in a series of subsequent generations.