Which of these best describes the role of plants in the carbon-oxygen cycle? A. to absorb carbon dioxide from the atmosphere and use it to make sugar B. to absorb oxygen from the atmosphere and release carbon dioxide into the atmosphere C. to absorb oxygen from the soil and use it to make carbon dioxide for sugar production D. to absorb carbon dioxide from the atmosphere and release it back into the atmosphere

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.