How to have seggs pls help

Why would one lymph node in the neck be swollen and not the other? what causes them to swell?

True or false a fertilized cell divides many times to form an embryo

How does drinking alcohol or using drugs put a person at risk for hiv infection? a.they improve judgment, which makes it more likely for people to engage in risky behavior. b.they impair judgment, which makes it more likely for people to engage in risky behavior. c.they impair judgment, which makes it less likely for people to engage in risky behavior. d.they improve judgment, which makes it less likely for people to engage in risky behavior.