A. The concentration of water should be higher on the outside because it allows water to slow into the cell to balance the concentration.
"The number of growth rings" is by far the best indicator of the age of a woody plant, although it should be noted that there are other ways of indicating age.
The correct answer is A. Standardized table is useful to use as a visual for the patient
A primary air pollutant is directly from the source and secondary pollutants are omitted from two or more different primary pollutants interact with each other in the atmosphere.
EX of primary: carbon monoxide, nitrogen oxide, sulfur oxid
EX of secondary: NO2 acid rain