Vaccination is a process of injecting a dead or weakened form of a pathogen into the body. How does this help strengthen the immune system?

One gene can influence trait(s). one trait can be determined by gene(s).

What would most likely happen if a person increased the amount of saturated fat in his or her diet? the person's risk of cardiovascular disease would increase. the person's risk of cardiovascular disease would decrease. the person's bad cholesterol would decrease. the person’s good cholesterol would increase.

Read each description below and determine to which stage of sleep each pertains. then click and drag each box into the appropriate category below.