First of all, it needs a deposit of carbon. Then, mass amounts of pressure and heat will be applied to the deposit. Over time, the carbon turns into a crystal which is either burst out of a volcano or remains under the ground.
Answer:
Cellular respiration that proceeds in the absence of oxygen is anaerobic respiration. Cellular respiration that proceeds in the presence of oxygen is aerobic respiration.
Similarities: cell membrane, genetic material, ribosomes, cytoplasm
Differences: cell arrangement, true membrane bound nucleus, DNA structure, membrane bound organelles, ribosome size, cytoskeleton, sexual reproduction, cell division
Difficult or painful digestion-dyspepsia