Populations A population is a group of organisms of the same species that live in the same place at the same time. Unitary Organisms Unitary organisms have a highly determinate form Life begins when the sperm fertilizes the egg.
Development produces a clearly defined individual.
It will remain in this form until it dies. One modules may die, but the other modules may live much longer. The fundamental module of construction above ground is the leaf with its axilary bud and attendent internode of stem. The population has various group characteristics which are statistical measures that cannot be applied to individuals. The density of a population is defined as number per unit area or unit volume.