2.  Photosynthesis and cellular respiration are found throughout the eukaryotic world. They are complementary to each other because they each use products of the other process. Recall the components and processes involved in each pathway. Which of the following do the two pathways share?  Question 4 options: a.  chloroplasts and mitochondria b.  Photosystems I and II c.  the cytochrome complex d. thylakoids