Question

Which of the following cycles does not involve living organisms?

Answer 1

The correct answer is letter C. Rock Cycle. Living organisms involved in carbon cycle, oxygen cycle, and in nitrogen cycle. These are involved in the air that living organisms are taking in and out.

Answer 2

Answer : Option C) Rock Cycle.

Explanation : Rock cycle is a basic concept in geology which deals with the time-consuming transitions that occurs through geologic time among the three main rock types: sedimentary, metamorphic, and igneous. It does not involves living organisms in this cycle.

Rest all the other cycle involves living organisms, carbon cycle has indirect impact of humans on it as it deals with the photosynthesis and the metabolism activities.

Oxygen cycle deals with the circulation of the oxygen through various forms in the nature including humans.

Nitrogen cycle involves nitrifying bacteria which converts the atmospheric nitrogen into ammonia and then convert it to nitrites for the use of plants.