Answer:
Carbon.
Explanation:
Carbon is a part of all organic compounds.
Answer:
I am going to guess A and C
Answer:
photosynthesis makes the glucose that is used in cellular respiration. while photosynthesis requires carbon dioxide and releases oxygen, cellular respiration requires oxygen and releases carbon dioxide. (they are the opposite) it is the released oxygen that is used by us and most other organisms for cellular respiration.
Explanation:
Answer:
An exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative." Exothermic reactions usually release heat and entail the replacement of weak bonds with stronger ones.