Question

1) write the advantage of Crop rotation?
2) why does life not exist on Venus and Mars while is exist on earth?
3) why is atmosphere essential for life?
4) name two biologically important compounds that contain both Oxygen and nitrogen?





Friends are solved in 4 answers​

Answer 1

1) to prevent crop from depletion

2) because they have no atmospheric ring

3) as it prevents essential gases and life within it's planet

4) protein and nucleic acid