Circulation is your blood flow, well in my words. Like for example "I'm losing circulation in my arm." They are having their blood flow slow down or even stopped. It doesn't always have to be blood, it can be any fluid
<span>All are mutagenic because they cause base substitutions, deaminating agents oxidatively deaminate bases so cytosine converted to uracil and adenine converted to hypoxanthine, uracil pairs with adenine and hypoxanthine pairs with cytosine, alkylating agents donate alkyl group to amino or keto groups altering base pair affinities</span>
Well, carbohydrates burn and release energy. Nucleic acids give identity (like DNA, RNA). Lipids also give energy, but it's more difficult (they must be first turned into carbohydrates first). Proteins are building blocks for the cells.
Now, knowing all of this should make it easy to choose the correct answer :)
<h2>A) Alpha Decay</h2><h2 /><h2>Your Welcome :) </h2>