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The most common elements present in organic compounds are carbon, hydrogen, oxygen, and nitrogen.
There are exactly 24 chromosomes in a girl cell and 24 in a boy cell.
Most mutations have no effect on organisms. Organisms all have large amounts of genetic code, most of which has no effect. As a result, mutation of this code is rarely meaningful.
You can reduce the levels of matter pollution by reducing the amount of particulate matter produced through smoke and by reducing vehicle emissions. Reduce the amount of particulate matter produced through any types of smoke.
