To come into being; develop.
To change; transform.
Of a population, to acquire or develop (a trait) in the process of biological evolution.
To give off (gas, such as oxygen or carbon dioxide during a reaction).
To move in regular procession through a system.
Of a trait, to develop within a population via biological evolution.
Of a population, to change genetic composition over successive generations through the process of evolution.
To cause something to change or transform.
To progress; to move forward.