Mutations cause changes in the genetic code that lead to genetic variation and the potential to develop disease. Gene mutations can be generally categorized into two types: point mutations and base-pair insertions or deletions. Point mutations are the most common type of gene mutation.
OVERNIGHTS: The Difference Between Night and Day. By. Isabelle Fox, Ph. D. Daytime gives us sunlight Nighttime brings on darkness. Daytime is familiar Nighttime is strange. Day time is for activity Nighttime is for comforting. Daytime is for learning Nighttime is for dreaming.
On the equator, the length of day and night are equal every day of the year-day is always twelve hours long and night is always twelve hours long. The Tropic of Cancer and the Tropic of Capricorn each lie at 23.5 degrees latitude.