Which natural event can occur either over a few weeks or over a few million years?
A standing wave can occur only at specific frequencies that are called natural frequencies.
The probability
There are really no steps in natural selection - just conditions required for it to occur.
What population? Perhaps you mean if there were no variation for natural selection to select from.
Without genetic diversity, natural selection cannot occur
Pangaea
earthquake
The probability that an event will not occur is calculated by subtracting the probability of the event occurring from 1. Given that the probability of the event occurring is 0.2, the probability that it will not occur is 1 - 0.2 = 0.8. Thus, there is an 80% chance that the event will not occur.
The chance that a given event will occur usually expressed between the number 0 will not and 1 the event will occur
Probability is the mathematical chance that an event will occur.
The probability that an event will occur plus the probability that it will not occur equals 1.
Probability of success is a mathematical chance that an event will occur.
The chance that a given event will occur, usually expressed between the number 0 (will not occur) and 1 (will occur) is called probability.
How likely it is for an event to occur.
That defines the odds in favour of the event.
id
an impossible event has a probability of 0, it will never occur a certain event has a probability of 1, it will always occur