Which metal is found in complex I of the electron and H+ transport chain?
A) Ca
B) Co
C) Fe
D) Mg
C
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What would happen to a river delta if damming reduced the amount of sediment in the river?
a) Nothing much would change because the water flows through the delta. b) The delta would stop growing. c) River water quality would improve. d) The delta would continue to grow as long as the river flows. e) The delta would erode and subside below sea level.
Which of these has enacted regulations that ban hazardous substances if safer alternatives exist?
A. European Union B. United States C. Democratic Republic of Congo D. China
Crop rotation is most commonly practiced in tropical forests
Indicate whether this statement is true or false
The energy efficiency of buildings can be improved by all of the following strategies except
a. building big windows into the northern side of new housing b. replacing standard windows with energy efficient windows c. plugging leaks d. using energy-efficient lighting e. using energy-efficient appliances