Examlex
The seasons on Earth are caused by the change in distance between the Sun and Earth.
Cyanobacteria
Photosynthetic bacteria that are often found in aquatic environments, capable of producing oxygen through the process of photosynthesis.
Aerobic Respiration
The process of producing cellular energy involving oxygen. It's the way most cells generate ATP, with carbon dioxide and water as byproducts.
Ozone Layer
A protective layer in Earth's stratosphere that absorbs most of the Sun's ultraviolet radiation, shielding the planet from harmful UV light.
Cyanobacteria
A phylum of bacteria that obtain their energy through photosynthesis and are noted for their role in the oxygenation of the Earth's atmosphere.
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