Which describes how the talk test is used to check exercise intensity? A. If you can talk while exercising, your exercise level is not intense enough.
B. If you cannot talk while exercising, your exercise level is too intense.
C. If you can talk before exercising, your warm-up should be more intense.
D. If you cannot talk after exercising, your exercise level is not intense enough.

NEED IT FASTTT PLEASE HELP !

Ways to when your friend is going through social isolation?

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.

Which is a type of epithelial tissue? a. the skin on your hand b. cardiac muscle c. neurons d. cartilage