BIO 181.

Scientific Reasoning Module - Act III Final Assignment Background A population is a group of organisms of the same species that live in a particular geographic location. For example, people living in the city of Phoenix are considered a population of humans. Biologists estimate the number of organisms in a population (population size) to know whether a species has become too rare or too abundant. Knowing a population's size also enables biologists to manage the resources needed to sustai...