<span> Climate is the average weather of a particular place.</span>
I'm not sure but but i think the answer will be:
A. additive genetic variance times the selection differential.
Cigarette smoking and environmental chemicals
Tobacco smoke and certain environmental chemicals are known carcinogens (substances that can cause cancer in living tissue). The tobacco smoke from cigarette smoking contains harmful chemicals such as hydrogen cyanide, arsenic, ammonia, benzene, and many more. In fact, from 2009 to 2013, three out of 10 cancer deaths in the U.S have been attributed to cigarette smoking or exposure to tobacco smoke.
According to <span>Chargaff's Rules, concentration of adenine is equal to the concentration of thymine. Therefor if adenine= 40% thymine= 40%.
BUT this only works for double strand DNA.The possibility of Adenine= 40% and Thymine= 60% is only in a single stranded DNA molecule.
Hope I helped</span>
