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.
Photosynthesis and cellular respiration are the complete opposites of one another but are also complementary processes. In photosynthesis, producers such as plants take in carbon dioxide, water and sunlight to produce glucose and oxygen. With cellular respiration, organisms combine glucose and oxygen to produce carbon dioxide, water and energy.