Sebaceous glands shrink in size :) hope that's you out
Less genetic variation in the inheritance of traits causes a crops ability to be more prone to disease because there are less alleles immune to disease in the genetic pool
Smoking is bad perharps, but it can cause a big effect on lung growth. Which can lead to respiratory problems and infections, shortness of breath and can cause a big effect when playing any type of sports. hope this helps.
