Babies with very low or very high birth weight are less likely to survive. The graph shows the percentage of babies born at different weights.
% Babies Born at Different Weights

Which statement is a valid claim that could be made using the data in the graph?
~Directional selection is occurring because the graph favors an extreme
~stabilizing selection is occurring because the average is favored
~disruptive selection is occurring because the two extremes are favored
~biodiversity variation is occurring because there is an increase in trail variation

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.