Why was the transition from purple bacteria to green bacteria important for the evolution of complex organisms

Which element is used in photosynthesis found in atmosphere and fixed by bacteria?

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d