A system is a collection of and other body parts that work together to carry out one of the body's major functions. Cells
Tissues
Organs
Bones

Lyme disease is caused by a bacterium transmitted to people by deer ticks. deer ticks are almost never born infected with the bacterium, but they can pick it up from feeding on an infected host in any of the tick's three successive stage of development: larva, nymph, adult. once infected, a tick remains infected through any subsequent developmental stages, but since a tick feeds on only one host in each stage, it follows that . people can be infected only by being bitten by a tick that is either in larval stage or in the nymph stage b. people cannot be infected by a tick that picked up the lyme disease bacterium in the adult stage c. it is not possible for a person to be infected by a tick that is in the nymph stage or by a tick that was infected with the bacterium while in the nymph stage d. people infected with the lyme disease bacterium cannot transmit bacterium to adult deer ticks e. only deer ticks that are adults can transmit the lyme disease bacterium to people

Peter's doctor calculated his body mass index (bmi) and determined that his fat-to-lean tissue ratio was a bit too high. which of the following should peter increase in his weekly schedule to specifically address this issue?

Which of the following statements about the societal costs of tobacco use is true? a. tobacco use affects the tax rate of only those individuals who smoke. b. the negative effects of tobacco use are only experienced by the smoker. c. tobacco users contribute to an overall loss of productivity. d. increased healthcare costs are mainly absorbed by tobacco users