This is the way in which a species' population grow and shrink over time. \

Population Dynamic

Explanation:

The population dynamic refers to the study of the magnitude and the age of a population in a particular dynamic system. It determines the growing and shrinkage of an existing population over a definite period of time and the factors that are responsible for these changes.

The change in population density is given by,

Population density change=(Births + Immigration) - (Deaths + Emigration), where the events namely birth, immigration, death and emigration directly affects the population density.

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.