However i did not pass the test. fix the sentence by adding a comma.

What types of energy transfers and energy transportations are involved in the domino chain reaction?

New york city has 2,181 inhabitants per square mile. the state of alaska has 1.03 inhabitants per square mile. ecologists would say alaska has a low exponential growth population density birth rate carrying capacity

Which substance contains thylakoids? a) nadph b)atp c)stroma d)chloroplast