What ion forms a concentration gradient as a result of the electron transport chain?

(6.02 mc)what affect do marine protected areas have on environmental quality? they increase environmental quality by preventing resource overuse. they increase environmental quality by adding new species. they decrease environmental quality by removing all human activity. they decrease environmental quality by adding recycling facilities.

The two main stages of cell division are called

What is an example of a scientific question that galileo could not have answered with out this new tool?