All individuals of a particular species in a given area, in theory all of these can interbreed.
All of the output of a process over a defined time period; or a given type of product in the same size and similar containers, and of the same style of pack.
The number of people in a given geographic area.
The number of people living in a country or town.
The number of patients in hospital.
All persons, plants, or animals inhabiting a specified area.
Smallest functional biological unit where a change of genes takes place more or less regularly.