All of the following gases are naturally occurring in the atmosphere EXCEPT— a) CO2
b) H2O
c) NO2
d) CFCs

Match the correct terms to their descriptions a system in which only energy but not matter is exchanged frozen water in snow part of geosphere that includes only soil a thin layer between the troposphere and the stratosphere cryosphere tropopause closed system pedosphere

What do genes contain the code for?

For each of the following situations, determine whether the population is in hardy-weinberg equilibrium or is evolving.