Limited resources of food and water, natural disasters of the environment due to fire, floods, etc., spread of deadly diseases that wipe out entire areas, predators, etc. These factors result in small population.
law
A law. A rule of nature is a phenomenon of nature that has been proven to occur whenever certain conditions are met, AKA Scientific Law.
Small populations.
It varies depending on what other conditions are present, but such collisions usually result in the formation of clouds and precipitation. Under colder conditions, snow will commonly occur. In warmer conditions, you will often see rain and sometimes thunderstorms.
It is the reproductive isolation between populations that allows divergence between populations, and ultimately speciation, to occur. Often this reproductive isolation is the result of geographical isolation, for instance when part of a population migrates to new territories.
Social, political, and economic conditions can alter the nature and meaning of art. There is censorship which may occur, as well as various themes and inspirations which are to be taken from the situations occurring in the artist's life.
Genetic drift has a larger effect on smaller populations.
An element occur in nature as a pure element or as a compound.
If all conditions are the same, then the same results will occur. (Objective reality is deterministic.) If a scientific theory predicts a certain result but it does not occur always, then the theory is incomplete or incorrect (or both).
Mutation cannot occur
Bromine is a liquid but doesn't occur in nature as a free element.
small populations