Passage II

The gypsy moth, which is native to Asia and Europe, was accidentally introduced to the northeastern United States in 1869. Gypsy moth larvae (caterpillars) eat tree leaves and have caused serious damage to forest ecosystems in the United States. Figure 1 shows the times of the year that the different stages of the gypsy moth life cycle occur. Figure 2 shows the percent of 1,000 test plots having light, moderate, or heavy defoliation (leaf loss) due to gypsy moth larvae each year from 1979 to 1983. Table 1 shows the average percent defoliation by gypsy moth larvae for individual tree species in the test plots in 1981.

9. On the basis of the information provided, did the majority of tree species listed in Table 1 suffer, on average, light, moderate, or heavy defoliation in the test plots in 1981?

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

First look at the definition of light/moderate/heavy defoliation in figure 2, which are less than or equal to 30%, 31%-59%, and greater than or equal to 60%;

According to table 1, it can be seen Most of the tree defoliation percentage is below 30, so it is light