Carotenoids are often found in foods that are considered to have antioxidant properties in human nutrition. what related function do they have in plants?

a. they serve as accessory pigments to increase light absorption
b. they protect against oxidative damage from excessive light energy
c. they shield the chromosomes of the plant from harmful ultraviolet radiation
d. they reflect orange light and enhance red light absorption by chloropyll
e. they take up and remove toxins from the groundwater

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.