A. Nitrogen cycle
B. Green Plants
C. Water
D. Carbon Cycle
Related Mcqs:
- Biological Oxygen Demand (BOD) is a measure of:?
- Which of the following gases are mainly responsible for the atmospheric greenhouse effect in the earth’s atmosphere?
- Which is an example for sedimentary biogeochemical cycle?
- An example of one way ecological cycle is __________?
- The cycle of life, death and decay involving organic nitrogeneous matter is called
- Biogas is composed of __________?
- The source of energy in an ecosystem is __________?
- Oxygen present in the atmosphere has been formed by:
- Arrange the following in ascending order of their occurrence in the atmosphere: (1) oxygen (2) Nitrogen (3) Carbon dioxide (4) Argon
- Which of the following gases has an important role in maintaining atmospheric temperature?
