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Microorganism
A microorganism (also spelled as microrganism) or microbe is an organism that is microscopic (too small to be seen by the human eye). The study of microorganisms is called microbiology. ... > more -
Ozone layer
The ozone layer is the part of the Earth's atmosphere which contains relatively high concentrations of ozone (O3). "Relatively high" means a few parts per million - much higher than the ... > more -
Genetically modified organism
A genetically modified organism (GMO) is an organism whose genetic material has been altered using techniques in genetics generally known as recombinant DNA technology. Recombinant DNA technology is ... > more -
Human cloning
Human cloning is the creation of a genetically identical copy of an existing, or previously existing, human being or growing cloned tissue from that individual. The term is generally used to refer to ... > more
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