Question

Photosynthesis is an endothermic chemical reaction that forms sugars from carbon dioxide, water, and the sun's energy. Which of the following must be true of photosynthesis?

The reaction can take place only if energy is added.
The reactants are oxidized.
The photosynthesis reaction produces ions.
The molecular bonds in carbon dioxide are very weak.

Answer 1

Plz help someone

Answer 2

@astrid1

Answer 3

the answer, is within the question itself -- look:

Photosynthesis is an endothermic chemical reaction that forms sugars from carbon dioxide, water, `and the sun's energy`. Which of the following must be true of photosynthesis?

if there is no energy, there is no photosynthesis -- that is why plants that grow in the dark die.