They produce the most oxygen on Earth for us.
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Cyanobacteria are capable of carrying out photosynthesis, converting sunlight into energy. They are important producers in aquatic food chains and can also help in nutrient cycling by fixing nitrogen from the atmosphere. Some cyanobacteria can produce toxins under certain conditions, posing a risk to human and animal health.
The pigment in cyanobacteria is phycocyanin. It is a blue pigment that plays a central role in the process of photosynthesis.
Thylakoid membranes of chloroplasts resemble those of cyanobacteria because chloroplasts are believed to have evolved from endosymbiotic cyanobacteria. During evolution, the cyanobacteria that were engulfed by a host cell eventually became mutually beneficial, leading to the development of chloroplasts. The structural similarity between the thylakoid membranes of chloroplasts and cyanobacteria is a remnant of this evolutionary relationship.
both! some species are unicellular some are multicellular
Cyanobacteria release oxygen as a byproduct of photosynthesis.
Organisms formerly known as blue-green algae are actually cyanobacteria. Cyanobacteria are a type of bacteria that can perform photosynthesis like plants, leading to their previous misclassification as algae.