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.
Purple line on nail: Fingernails can have many different signs. Purple lines may represent a couple different things; mole/freckle at the nail base or splinter hemorrhage. The latter is not specific to any disease state, but may be a sign of something else that is going on. If you recently injured your nail bed, that might be a sign of bruising.