NATURAL processes that cause air pollution, and climate change, within the Earth's atmosphere can consist of: smokestacks and cars
volcanoes and wildfires
power plants and busses
volcanoes and man-made-fires

Why are adults bigger than they were as children biology

Ascientist wants to determine the effect of a new type of gasoline. he fillsone car with normal gasoline and another identical car with the new gasoline. which is the control group? a. the new type of gasolineb. the car with the normal gasolinec. the car with the new gasolinethe amount of gasoline usedd. the amount of gasoline used

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?