Algae are a large and diverse group of autotrophic organisms. Algae can be unicellular or multicellular but the largest and most complex marine type is seaweed. Algae can come in a variety of sizes, shapes, colors, and have different functions. Algae are helpful to our world because they are photosynthetic and they produce a large amount of oxygen in our atmosphere. Some algae can also control pollution and that can be very helpful. Algae are everywhere in our world and they take role in many different ways in their environment. Hopefully they will continue to exist and be primary producers.
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