On average, how many words make up the vocabulary of a four-year-old? ,000-2,000 2,000-3,000 3,000-5,000 ,000-6,000

Explain which dri value would you use to make sure that the vitamin supplement that you use does not contain too much vitamin a

Explain why you believe physician assisted suicide should or should not be legalized in more states across the us.

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.