Where does the reaction of the electron transport chain occur? 1. within the mithochondrions matrix 2. inside the cell membrane 3. within the mithochondrions linner membrane

Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.