What is the main cause of the deforestation in haiti?
a)
urban sprawl
b)
industrialization
c)
biofuel production
d)
poverty
e)
mining

Which class of molecules contains the amino group, nh2 (a) sugars (b) water (c) proteins (d) hydrocarbons

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

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .