Why are biodegradable bags being made but they are not found in grocery stores? They are cheaper than paper bags and they are far more eco friendly! What is wrong with the company's making the biodegradable bags?

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.

In your own words write a brief paragraph about the importance of warning signs.

Which aspect of a workout includes preparing the muscles for vigorous activity? cooling down preparing a schedule warming up determining target heart rate