Nitrogen (N2)is
A)a key component of life,integrated into our bodies directly from the air.
B)cycled through the environment via the activity of bacteria.
C)a product of the radioactive decay of a form of potassium in the crust.
D)now measured at 20.946% by volume in the homosphere.
E)the least abundant constant gas in the homosphere.

Question

Quizplus · Accepted Answer

Nitrogen is cycled through the environment via the activity of bacteria. While nitrogen is a key component of life and can be integrated into our bodies, it is not directly obtained from the air. It is also not a product of radioactive decay and is actually the most abundant gas in the homosphere, measured at 78.08% by volume.