a community wants all of its citizens to become more physically active. which of these strategies would be the most practical solution? a. purchasing a bicycle for each household
b. building pedestrian-friendly walkways
c. increasing taxes for medical clinics
d. paying for gym memberships for senior citizens

Abanana can be an excellent source of potassium in our diet. there is a naturally occurring, long-lived, radioactive isotope of potassium, 40-19k, which has a natural abundance of 0.0117% and a half-life 1.27 billion years. estimate the activity of a typical banana due to this potassium isotope assuming that most of the mass is in stable potassium.

Adangerous they will drug created from marijuana or tobacco soaked in embalming fluid and or laced with pcp is known as hashish, wet stick, green joint, or black resin

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.