Why do algae have chlorophyll?
Answers
Answer:
Chlorophyll makes plants and algae appear green because it reflects the green wavelengths found in sunlight, while absorbing all other colors. The different forms of chlorophyll absorb slightly different wavelengths for more efficient photosynthesis.
Answer:
Chlorophyll is not the only photosynthetic pigment found in algae and phytoplankton. There are also carotenoids,and phycobilins (biliproteins). These accessory pigments are responsible for other organism colors, such as yellow, red, blue and brown. Like chlorophylls B, C, D, E and F, these molecules improve light energy absorption, but they are not a primary part of photosynthesis. Carotenoids can be found in nearly every phytoplankton species, and reflect yellow, orange and/or red light 15. There are two phycobilins found in phytoplankton: phycoerythrin and phycocyanin. Phycocyanin reflects blue light and is responsible for cyanobacteria’s common name – blue-green algae. Phycoerythrin reflects red light, and can be found in red algae and cyanobacteria.
Some algae will appear green despite the presence of these accessory pigments. Just as in plants, the chlorophyll in algae has a stronger relative absorption than the other molecules. Like a dominant trait, the more intense, reflected green wavelengths can mask the other, less-reflected colors 20. In green algae, chlorophyll is also found at a higher concentration relative to the accessory pigments. When the accessory pigments are more concentrated (such as in red algae, brown algae and cyanobacteria), the other colors can be seen 23.
Explanation:
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