The reduction of which energy source would have the greatest effect in minimizing air pollution?

hydroelectric
coal
petroleum
natural gas

The number of living organisms in a particular area is

Select the word from the list that best fits the definition a system made of 25 satellites

Which of the following is a true statement? a. individuals evolve to have adaptations. b. individuals have adaptations that can change over time. c. individuals have traits that may or may not make them successful at reproduction. d. populations cant evolve, only individual organisms.