Phycobiliproteins are complex proteins in cyanobacteria that absorb light energy. There are three kinds of phycobiliprotein molecules used to pass light to chlorophyll: phycoerythrin-responsible for capturing green light, phycocyanin-responsible for capturing orange-red light, and allophycocyanin-responsible for capturing red light. Since light can only penetrate to certain depths in oceans, phycobiliproteins capture the light available and pass it through various pathways of phycobiliproteins until the emitted light is red, which is absorbed by chlorophyll. Use the figure below to answer the following questions. 7.5m UV 15.0m 22.5m 30.0m. 37.5m O Tomemorris 2020 Blue Green Red Creative Commons Attribution-Share Alike 4.0 International license. IR 25ft 50ft 75ft 100ft 125ft a. Explain the relationship between chlorophyll absorption and wavelength. b. In addition to the pigments commonly associated with photosynthesis, a certain photosynthetic species contains two additional pigment types. Justify the claim that this species is better adapted to environmental changes than the cyanobacteria described above. Provide reasoning that explains this claim.

The subject concerns the part played by phycobiliproteins in cyanobacteria and how photosynthesis is encouraged by their relationship with light vitality. Perceiving how wavelength and chlorophyll retention are related, as well as how a photosynthetic species' capacity to assimilate more pigments may give it an versatile edge against cyanobacteria.Answer (a):As the ocean's depth deepens, the less intense light, or the UV blue and green regions, exhibits the highest rate of absorption by chlorophyll since they have the shortest wavelengths. Whereas chlorophyll absorbs the most at deeper depths, the greatest wavelength, or orange-red area, is absorbed the least.In any case, beneath ordinary circumstances, chlorophyll absorbs most of the blue and red light whereas absorbing the slightest amount of the green light due to their accessibility.Answer b):Less than 25-foot-long organisms do not require phycoerythrin, also known as phycobilins, which absorb green light. This is because, as the picture illustrates, blue, violet, and red light wavelengths are readily available above 25 feet. Therefore, for chlorophyll to produce and absorb red light, the whole phycoerythrin pathway isn't required. The cyanobacteria's orange-red and red light is absorbed by the phycocyanins and allophycocyanins, which results within the outflow of green wavelengths.The relationship between chlorophyll absorption and wavelength in ocean depths reveals that chlorophyll absorbs light most intensely in the UV blue and green regions with shorter wavelengths, particularly at deeper depths. Conversely, the orange-red wavelengths are absorbed the least. Generally, chlorophyll predominantly absorbs blue and red light while absorbing minimal green light under normal circumstances. In the context of certain photosynthetic species, organisms under 25 feet may not require phycoerythrin, as sufficient blue, violet, and red light is available. This adaptation eliminates the need for the phycoerythrin pathway, and other pigments like phycocyanins and allophycocyanins in cyanobacteria absorb orange-red and red light, allowing the outflow of green wavelengths.

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