Number 2, sun increases basically everyday.
I thinking A. or B. but im sure it one of them. that's a 50% chance.
Okay, biology isn't exactly my strongest subject (it never has been), but I'm pretty sure the answer is nucleotides. DNA is made up of nucleotides. Each nucleotide contains a phosphate group, a sugar group, and a nitrogen base. There are four different nitrogen bases: adenine (A), thymine (T), guanine (G), and cytosine (C). A always pairs with T, and G always pairs with C.
Skin is the Largest barrier agaisnt Pathogens which include Bacteria which cause infections.
