In C3 plants, what is the role of ribulose-1,5-bisphosphate (RuBP) during carbon fixation?

Why is RuBisCO considered the most abundant protein on Earth?

What is photorespiration and why is it considered inefficient?

How do temperature and water availability affect the efficiency of carbon fixation in C3 plants?

What is the initial product formed when CO2 is fixed in C3 plants?

Which cell types are involved in the separation of carbon fixation in C4 plants?

What environmental condition primarily triggers the closure of stomata in C3 plants, affecting carbon fixation?