Populations grow exponentially when they can maintain a constant growth rate percentage and can leverage the steady increase in population. Exponential growth of various species have been seen throughout Earth's history.
Because the offspring of life forms have the capability to reproduce, a constant growth rate in population leads to exponential growth. There are a greater number of beings to reproduce than the previous generation, and if they reproduce at the same rate as the previous generation, growth of the population in terms of population numbers increases more and more quickly. Provided a species has abundant natural resources and space to grow and multiply, and they reproduce more quickly then they are killed by age, disease or predators, exponential population growth is likely to occur. However, habitats with insufficient resources or sufficient predators hinder the survival of the species, causing slower growth, decline in population or even potential extinction if the environment becomes uninhabitable.