What research method is used in order to establish what causes a behavior? an experiment What is the first step of the scientific method? pose a question In the science of human development, &quot;nurture&quot; refers to: environmental influences.
Vertical lines on one's nails, like those the writer seems to have, are a common phenomenon that often get more pronounced with age. There are many reasons for ridged nails but the most common is aging, says Dr. Phoebe Rich, M.D., FAAD, clinical adjunct professor of dermatology at Oregon Health Science University.
Horizontal Ridges In Nails. Horizontal lines in your fingernails, as the name suggests run side to side across your nail bed, unfortunately their presence signifies a more serious problem than vertical ridges. The main cause of horizontal or transverse ridges is usually trauma to the nail bed or a medical condition. If you happen to notice horizontal ridges and you have not experienced any recent trauma to your nails and you are concerned then I would take the time to talk to your health care provider.â.