<span>the oldest form of biotechnology is : selective breeding
biotechnology included all kind of efforts that we use to obtain a desired genetic result from the reproduction of a certain organism.
In the early years of biotechnology, we still hasn't developed a way to do genetic manipulation, so we do selective breeding to obtain our desired result</span>
vaccines are weakened viruses or bacteria that prompt the body to develop antibodies to foght against disease
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Bacterial communicable diseases
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Answer:
air pollution can irritate your airways and may cause shortness of breath, coughing, wheezing, asthma episodes and chest pain.
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