Definition of ribbon. 1  1a : a flat or tubular narrow closely woven fabric (as of silk or rayon) used for trimmings or knittingb : a narrow fabric used for tying packagesc : a piece of usually multicolored ribbon worn as a military decoration or in place of a medald : a strip of colored satin given for winning a place in a competition.
Photosynthesis is the process by which organisms that contain the pigment chlorophyll convert light energy into chemical energy which can be stored in the molecular bonds of organic molecules (e.g., sugars). Photosynthesis powers almost all trophic chains and food webs on the Earth.
Photosynthesis is the process used by plants, algae and certain bacteria to harness energy from sunlight into chemical energy.There are two types of photosynthetic processes: oxygenic photosynthesis and anoxygenic photosynthesis. Oxygenic photosynthesis is the most common and is seen in plants, algae and cyanobacteria.hotosynthesis is the process used by plants, algae and certain bacteria to harness energy from sunlight into chemical energy.