Passage IV
Because amphibian eggs lack a hard outer shell, their DNA can be damaged by exposure to ultraviolet (UV) radiation in sunlight. Table 1 lists the egg-laying behavior of 7 amphibian species and the species’ relative ability to repair DNA damage caused by exposure to UV radiation.
Figure 1 shows the percent of eggs that survived to hatching in the lab for these 7 species after exposure to unfiltered sunlight or to sunlight from which the UV radiation had been filtered out.
Figure 2 shows predicted UV levels over time in 4 geographic regions that have amphibian populations.
23. Based on the data in Table 1 and Figure 1, amphibians that had the lowest percent of eggs that survived to hatching when exposed to unfiltered sunlight tend to:
Your Answer is
Correct Answer is A
Explanation
Look at figure 1 first, after Species A is exposed to sunlight, the egg hatching rate is the lowest;
Corresponding to table 1, the egg-laying behavior of Species A is eggs buried