Sarah wants to know which brand of nail polish lasts the longest without chipping. she buys 4 types of nail polish – essie (which she normally uses,) butter, opi, and sally hansen. every sunday for 4 weeks she paints her nails with a different brand of polish and records how many days she lasts before she gets her first chip. she makes sure to use the same bottom coat and top coat with each type of polish, and she makes sure to do the same weekly routine each week so that her nails aren't getting treated more roughly different weeks.

explanation: grsaa

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

lipid

explanation: