What are the three stages of aerobic cellular respiration?

a. glycolysis, krebs cycle, electron transport chain

b. glycolysis, phosphorylation, photosynthesis

c. krebs cycle, fermentation, assimilation

d. electron transport chain, assimilation, fermentation

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.