In population genetics and population ecology, population size (usually denoted N) is the number of individual organisms in a population.
300,567,234million people in Americas
A prey
Relative population size is the size of an area's population as it compares to similar areas' populations. For example, the relative population size of a country would be what rank it had compared to the population of other countries.
The population size of a predator species is directly controlled the availability (population size, etc.) of its prey species.
Population density
From a sample of a population, the properties of the population can be inferred.
The sumation (each stratum of population) of risk * population size. For example: (risk*population size of group 1) + (risk*population size of group 2) + ... + (risk*population size of group n)
population dynamics-Population dynamics is the study of the factors that influence these changes in a population's size
In size, the USA. In population, Indonesia.
population size and per unit of area population size and per unit of area
the population was about 300,000
The number of individuals in the population is the population's size. If a population is small enough you will be able to determine the size by counting the individuals.
Exponential