Answer: Plants do both photosynthesis and cellular respiration.
Explanation:
All cells do cellular respiration even without light.
Honestly, photosynthesis alone would be right since the teacher didnt state the questions correctly. But you should choose both cause in the light it does both.
RUBISCO!
Ribulose-1,5-bisphosphate carboxylase/oxygenase
Explanation:
if you were trying to find the function of something it you would mainly think of roles, jobs, responsibilities, chores etc, where as if you were trying to find the structure it would be how something is made up or its form.
for example the srtucture of a plant, meaning its form or how it grew, its function depends on what type of plant, if it were just a regular plant or leaf, the stomata, cell wall, cell membrane, nucleus, chloroplasts, chlorophyll inside the chloroplasts, mitochondria, cytoplasm, would be requied to do their funtions i.e their jobs to keep the plant/leaf alive