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.
Planetary days begin at sunrise, so the hours between midnight and sunrise belong to the previous day. In order to account for the seasonal difference in length of daylight, the amount of time in each hour is different in the day from the night. Only at the equinoxes are hours about six ty minutes each day and night.