Examlex
What makes Russia distinctive?
Cyanobacteria
Photosynthetic microorganisms that are important in ecological systems for oxygen production and as a part of the nitrogen cycle.
Fossilized Eukaryotes
Remains or imprints of ancient organisms with complex cells, preserved in rock.
Cyanobacteria
A phylum of bacteria that obtain their energy through photosynthesis, often referred to as "blue-green algae."
Ozone Layer
A layer in the Earth's stratosphere containing a high concentration of ozone, which absorbs most of the sun's ultraviolet radiation.
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