What do the elements in Group 17 have in common? A. They rarely react with any other elements.
B. They tend to form ions with a -1 electric charge.
C. They are all found in nature in their pure forms.
D. They tend to form ions with a +1 electric charge.

Which of the following steps is not likely to take place during cellular respiration? (5 points) select one: a. oxygen combines with carbon of simple sugar. b. energy molecule transfers energy to cells. c. simple sugar breaks down. d. energy is used up.