Claudia's dad has a family history of cancer. he tries to prevent developing the disease himself. even though he works outside every day, he always wears sunscreen, long sleeves and pants, and a hat. he only smokes outside in the shade of a tree or building. he eats healthy foods, and exercises almost daily. he even makes an effort to see his doctor regularly for well-checks.
which of claudia's dad's actions is not him to avoid cancer?
a. he eats healthy foods, and exercises almost daily.
b. he only smokes outside in the shade of a tree or building.
c. he always wears sunscreen, long sleeves and pants, and a hat.
d. he even makes an effort to see his doctor regularly for well-checks.

Viruses use the host's machinery to make copies of themselves. however, some human viruses require a type of replication that humans do not normally have. for example, humans normally do not have the ability to convert rna into dna. how can these types of viruses infect humans, when human cells cannot perform a particular role that the virus requires? a) the virus causes mutations in the human cells, resulting in the formation of new enzymes that are capable of performing these roles.b) the viral genome codes for specialized enzymes not in the host.c) the virus infects only those cells and species that can perform all the replication roles necessary.d) viruses can stay in a quiescent state until the host cell evolves this ability.