If you work with a Windows-based scripting language, such as VBScript or KiXtart, you're accustomed to variables being nothing more than a sort of storage mechanism for data. Windows PowerShell has variables, too, but they're much more powerful than the variables in older scripting languages. The Windows.
Chlorophyll is a complex molecule. Several modifications of chlorophyll occur among plants and other photosynthetic organisms. All photosynthetic organisms (plants, certain protistans, prochlorobacteria, and cyanobacteria) have chlorophyll a. Accessory pigments absorb energy that chlorophyll a does not absorb.
In terms of organisms, photosynthesis occurs in autotrophes that contain the green pigment chlorophyll. This would include the entire plant kingdom, half of the Protista (the algae), & half the Moneran Kingdom (the blue-green algae). On the multicellular level, photosynthesis occurs in the leaves of plants.