In the sodium-potassium pump, how many sodium ions are moved and what direction do they
move?

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

How does the carbon cycle involve an exchange of carbon

What goes in and out of a cell respiration?