1. The electrons (brought by NADH and FADH.) pass through the proteins of the Electron Transport Chain
(ETC). What do the proteins do as a result?

Explain why biological control methods are generally environmentally superior to chemical pest control methods.

Isotopes of the same element have differ in their

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land