Other sites let you use the Google Authenticator app to generate the six-digit number. The app generates a different six-digit number for each connected site, and these numbers change every 30 seconds. With the app, you don't have to wait a few seconds to receive a text message.
Population depends on the rate of growth , as well as external factors. Population is influenced by factors like birth rate & death rate . Birth rate (Natality)- This refers to the number of newborns in a region at a given time. Death rate (Mortality) - This refers to the number of deaths in a region at a given time.
Objectives: 1  1. Distinguish between population size, population density, population distribution, age structure, and reproductive base. 2  2. Know how to calculate the net growth rate for a population, and how to graph the resulting numbers to produce a J-curve (worksheet) 3. Explain the factors that limit the biotic potential and carrying capacity of a population, including density-dependent, and density-independent limiting factors. 4. Explain how human population growth went from 1 billion in 1800 to 6 billion in 1999. Have a reasonable estimate of the population of the US and world. 5.