UGC NET Environmental Science Q111

Question

Identify the correct statements with reference to biogeochemical cycle.
A. It involves both physical and biological processes.
B. It is also referred to as a material cycle or nutrition cycle.
C. Of all the biogeochemical cycles, the nitrogen cycle is the most important as nitrogen makes up 78% of the atmosphere.
D. In biogeochemical cycle the movement of materials is unidirectional.
Choose the correct answer from the options given below :