Which is a density-independent factor limiting population growth?
a. niche size b. volcanic eruption c. convergent evolution d. resource competition

The lines marked by the letters a, b, and c on the map above represent a. chains of volcanoes b. earthquake fault lines c. thin strips of heavy forests d. major rivers that flow from north to south

Where is the only location in the united states where you drive on the left side of the road?

How long does it take hair to grow 8 inches?