to cause to hold or exhibit a particular bias; to influence, especially unfairly: a tearful plea designed to bias the jury; a survey biased toward highly educated people. 11.
Moles are caused when cells in the skin, called melanocytes, grow in clusters or clumps. Melanocytes are distributed throughout your skin and produce melanin, the natural pigment that gives your skin its color.
These are sun exposure, number of moles on the skin, skin type and family history (genetics). 1  Sun Exposure â Both UVA and UVB rays are dangerous to the skin, and can induce skin cancer, including melanoma. 2  Moles â People with many moles are at an increase risk of developing melanoma.