What two gasses probably dominated precambrian earth's atmosphere

Based on the data in your tables, did the light-colored moths have a higher or lower survival rate after the industrial revolution?

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point