Which of the following statements about C3 carbon fixation is true? a. C3 carbon fixation is an adaptation for plants exposed to high light intensity. b. C3 carbon fixation occurs in more plants than C4 carbon fixation. c. C3 carbon fixation is more common in areas of high temperatures than C4 carbon fixation. d. C3 carbon fixation occurs in the inner cells of a leaf rather than the entire leaf.

Most likely a is the answer - because  you generate   38 atp's but also consume an atp.   each atp gives approx. less than 4 kcal so probably a is the closest answer.

The correct answer is "atomic weight".

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na