Which phrase describes air density? O increases as altitude increases
O equals mass divided by volume
O pushes molecules in one direction
O exerts less pressure as it increases

Organisms that successfully adapt will leave to grownone of the above

During an experiment, readings for blood pressure in a persons body were found to be constant . however , when he measured by a different blood pressure cuff , the readings differed by 15 points for each reading. this difference indicates that the results are

24. how are vaccines used to keep people healthy?