Answer:
1.1 that's 1 in 7 and it's most common in adolescents
Cyanobacteria were the first life forms on earth, according to fossils dating back 3.7 billion years.
B to obtain oxygen
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<span>Light energy is absorbed by chlorophyll, a green substance found in chloroplasts in some plant cells and algae. Absorbed light energy is used to convert carbon dioxide (from the air) and water (from the soil) into a sugar called glucose. Oxygen is released as a by-product. - BBC</span>
