This happens when a detection is accomplished through heuristics. There is no such thing as a heuristic virus. As a technical concept, everything in malware detection is done via heuristics.
Photosynthesis is the process in which plants (also autotrphoic protists and some bacteria) use light energy, from the Sun, to make sugars and organic food molecules from CO2 and water (H2O). This process is essential for the formation of not only energy, but also for the formation of glucose for purposes of structure.
Henry Wagner, 'Reckon I know why that green sac spits out glucose n' oxygen. Views. Photosynthesis does not produce glucose. The end product of photosynthesis is G3P, which can then be converted into glucose (for short term energy storage), starch (for long term energy storage), and cellulose (for structure).