In the respiration-photosynthesis cycle shown above, what are the reactants of cellular respiration that belong in box 1?

A.

glucose and oxygen

B.

ATP and methane

C.

protein and nucleic acids

D.

carbon dioxide and water

Which sequence correctly shows the path of carbon dioxide during repiration?

Where can you find prokaryotic and eukaryotic cells?

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