Page 308 - ABCTE Study Guide_Neat

Nitrogen Cycle

Question

Rain forests move water into the atmosphere by

A saturation.

B transpiration.

C sublimation.

D condensation.

Answer

The correct answer is B. Transpiration occurs as plants take in water through their roots and move it out
into the atmosphere through their stomata.

The Nitrogen Cycle

Most of the air you breathe is nitrogen. Essential to living organisms, nitrogen is a critical component of
proteins and nucleic acids and is often in short supply. Despite their dependence on nitrogen, very few
organisms can make any use of the atmospheric N 2 form of nitrogen. They depend on the nitrogen cycle
and the role of specific organisms to supply the nitrogen needed. There are several components of the
nitrogen cycle, which converts atmospheric nitrogen to a useable form and eventually back to N 2.