Not All Stevia Is Created Equally. Stevia can be grouped into three main categories: 1. Green leaf stevia: Of the various types of stevia, this is the least-processed, as the leaves have been dried up and ground into powder form.This form of stevia has been used throughout Japan and South America for centuries as a natural sweetener and health remedy.. Medication interactions: There are certain medications that interact in a negative way with stevia, including: 1  Lithium: Stevia can often act as a diuretic and prevent the bodyâs ability to rid itself of lithium.
population definition: Population is the number of people or animals in a particular place. (noun) An example of population is over eight million people living in New York City....
Photo by: Christian Wilkinson. A population is a collection of individual organisms of the same species that occupy some specific area. The term population dynamics refers to how the number of individuals in a population changes over time. Biologists study the factors that affect population dynamics because they are interested in topics such as conservation of endangered species (for example, the Florida panther) and management of fish and wildlife.