What is the temperature at this station? a)987 degrees
b)75 degrees
c)11 degrees
d)61 degrees

When analyzing tree rings, what do scientists assume a thin ring indicates?

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

Which is not a likely outcome after extensive irrigation of dry farmland? useless, unproductive soil salinization of the soil depletion of groundwater nutrient-rich soil