Help with grade 12 biology questions please 

Understanding photosynthetic processes can increase food yield. In Ontario, a number of fresh vegetables are grown all year in greenhouses. This allows the grower to control the conditions of the plants.

a) Identify the abiotic factors that can be controlled and the impact of each.

b) How can a grower affect each factor?

How does the Calvin cycle rely on the light-dependent reactions? (Worth 3 marks) so at least 3 sentences