Lisa is beginning a weight-training program to firm up and gain muscular strength. she has decided to do some cycling or treadmill jogging to warm up, stretch before the workout and lift weights that isolate each muscle group in her body. she'll take the time to stretch before she leaves the gym. she is so dedicated that she is going to do this workout every day. after doing this for a few months, what may be the biggest concern?
a. lisa could experience burnout from spending so much time in the gym.
b. lisa could become obsessed with how she looks.
c. lisa might lose her friends because she is devoting too much time to working out.
d. lisa might experience symptoms of overtraining, like weight loss and increased irritability

What should you not do when doing abdominal workouts? a. keep your chin off your chest b. keep your head aligned with the spine c. put pressure on your neck d. all of the above

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.

Select all of the possible methods of aids transmission.