Biosphere, relatively thin life-supporting stratum of Earth's surface, extending from a few kilometres into the atmosphere to the deep-sea vents of the ocean.
The inflammatory disease of the central nervous system that attacks the myelin sheath is known as MULTIPLE SCLEROSIS
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In our community the ecosystem provides fresh drinking water via pipes called citywater or ground water. It should be protected well, because it is our cities only source of clean water, ''purified''.
Yes, the DNA replication proceeds in one direction.
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