Shawn is creating a visual model of the four nitrogen bases of dna. he wants to show the base pairings. which of the following are the base pairings in dna?
a. adenine bonds with thymine, cytosine bonds with guanine
b. adenine bonds with guanine, cytosine bonds with thymine
c. adenine bonds with cytosine, guanine bonds with thymine
d. adenine bonds with uracil, cytosine bonds with thymine
e. adenine bonds with uracil, cytosine bonds with guanine

Hiv is inactivated in the laboratory after a few minutes of sitting at room temperature, but the flu virus is still active after sitting for several hours. what are the practical consequences of these findings? a) hiv can be transmitted more easily from person to person than the flu virusb) the flu virus can be transmitted more easily from person to person than hivc) this property of hiv makes it more likely to be a pandemic than the flu virusd) disinfecting surfaces is more important to reduce the spread of hiv than the flu