Both the pm10 and pm2.5 units refer to what characteristic of atmospheric particles?

Which type of neuroglia is found outside of the brain?

What type of competition exsist between two species. turtles and fish

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