Energy flow in plants -- concept map plants are best known for their ability to perform photosynthesis, the process by which light energy is converted to chemical energy in the form of sugars. but plants don't just make sugars; they use them, too. like animals, plants must break sugars down to fuel cellular work. in this activity, you will complete a concept map showing the interrelatedness of sugar production and sugar breakdown in a plant cell. part a - photosynthesis and respiration in plants drag the labels from the left to their correct locations in the concept map on the right. not all labels will be used.