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.
1 Recognize and describe that gradual (climatic) and sudden (floods and fires) changes in environmental conditions affect the survival of organisms and populations. ( 2 MD 3.0 D.1.a (Grade 8). 3  Explain that populations increase or decrease relative to the availability of resources and the conditions of the environment.