The apparent brightness of a star is how much energy is coming from the star per square meter per second, as measured on Earth.
Our DNA is very different ex: number of chromosomes , genes , sequences of DNA code etc
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Answer:
Ozone layer saves the earth from the ultraviolet rays of sun which is harmful for earth. It is situated jn upper atmosphere and saves earth. But thus chlorofluorocarbons destroys the Ozone Layer in the atmosphere.
