Which of the following is the appropriate amount of exercise for its age group?
a. adults should include 5 hours of muscle strengthening per week.
b. adults can exercise with moderate intensity for two hours and thirty minutes per week.
c. older adults (65+) should exercise 60 minutes per day.
d. children 6-17 should exersice 75 minutes per day.

The results of the dexa measurements are known as?

Amalignant tumor that originates within glandular tissue is called

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.