1. How do pollutants enter the deciduous trees and become less harmful? A. Roots filter the damaging pollutants through root hair
B. Stems extract pollutants traveling through the xylem and phloem
C. Stomata absorbs pollutants that are converted to less harmful compounds by enzymes.
D. Cell walls block pollutants from existing the leaf after becoming trapped.

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.