Which of the following is TRUE of nitrogen? A) There is very ...

[skymedlock]

Which of the following is TRUE of nitrogen?
 
  A) There is very little nitrogen in the atmosphere.
  B) The human body obtains the nitrogen it needs from the air.
  C) The nitrogen that the human body needs is derived from foodnot the air.
  D) Nitrogen is a variable gas.

Question 2

Seasonal fluctuations in CO2 emissions reflect
 
  A) seasonal changes in vegetation cover in the higher latitudes of the Northern Hemisphere.
  B) summer melting in the tundra.
  C) increased fuel use for home and building heat in winter months.
  D) geothermal activity, which is highest in the fall.

[cegalasso]

Answer to Question 1

C

Answer to Question 2

A

[skymedlock]

Excellent

[Chelseyj.hasty]

Gracias!