Question

refer to the table. the relationship between genetic divergence (in sequence divergence) and the extent of reproductive isolation is plotted for three lineages of frogs. reproductive isolation is measured on a scale ranging from zero representing no isolation, to 1 representing complete isolation. % sequence divergence lineage a lineage b lineage c 0.5 0.33 0.05 0.38 1 0.35 0.11 0.52 1.5 0.38 0.15 0.59 2 0.40 0.22 0.64 2.5 0.41 0.26 0.73 what would be the likely amount of reproductive isolation of frogs in lineage b that have diverged by 4 percent in dna sequence based on the observed data? 0.05 0.11 0.22 0.45 0.84

Explanation:

Step1: Observe the trend in lineage B data

As % sequence divergence increases in lineage B, the reproductive isolation value also increases. The values increase in a somewhat linear - like fashion.

Step2: Estimate the value for 4% divergence

The last value in the table for lineage B is at 2.5% divergence with a reproductive isolation of 0.26. Since the trend is increasing, and 4% is much larger than 2.5%, we can expect a value much larger than 0.26. Among the options, 0.84 is the only value that is significantly larger and consistent with the increasing trend.

Answer:

E. 0.84