Why does plastic wrap cause friction?

(amoeba sisters video recap: pedigrees and need

To maintain asepsis when administering an injection, all parts of the syringe can be handled except the:

Dawn mistakenly took a multivitamin intended for men that contains 90 mg of vitamin c (or 100% of the vitamin c rda for men). if the multivitamin was dawn’s only source of vitamin c for the day, what percentage of the women’s vitamin c rda did she consume? a. 52% b.83% c.100% d.120%