Answer:
False
Explanation:
Scientist believe that the primitive atmosphere lacked free oxygen. Oxygen is a highly reactive molecule that would have made difficult for complex macromolecules to appear and then create life. Rocks from the precambrian period support this theory.
Anaerobic cells appeared first, then photosynthesis appeared filling the atmosphere with oxygen and the aerobic organism develop cellular respiration to obtain energy, a process more efficient than anaerobic respiration.
You can’t really do that. You look for questions and ander them
Pretty sure that the answer is A
C hydrosphere, lithosphere, biosphere
It is a natural acceptable fast process of cleaning contaminated materials in the environment. It is cost effective in cleaning hazardous wastes compared to other methods.This method can easily be done without disrupting normal activities. Residues for this kind of treatment are usually harmless products.
