In space, an astronaut's jet pack that releases compressed nitrogen in one direction will
a) move the astronaut in the direction opposite that in which the gas is released
b) contaminate space
c) move the astronaut in the direction that the gas is released
d) make

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.