Smoking has been statistically identified as a <em><u>causative</u></em> element in the development of cancers of the lung, tongue, esophagus, and stomach.
It's certainly not a <em>prevention</em> in any way.
Temporary changes would be weather, since it can change at any givin time another example would be tides coming in because they vary by day, or wet sand becoming dry sand!
Hi Patinjordan,
mRNA has codons, each made up of 3 bases, which code for a particular amino acid.
-AS
Is a permanent alteration in the DNA sequence that makes up a gene.
