True or false: lifespan has been increasing so that people are living longer.

The skin includes multiples layers. which of the following is not one of the layers of the skin?

Does the weight loss program have practical significance? a. no, the program is not practically significant because the results are likely to occur even if the weight loss program has no effect. b. yes, the program is practically significant because the results are too unlikely to occur by chance. c. yes, the program is practically significant because the amount of lost weight is large enough to be considered practically significant. d. no, the program is not practically significant because the amount of weight lost is trivial.

Select all of the possible methods of aids transmission.