The scientist analyzes the insulin molecules, which are proteins, of three different species, A, B, and C. The insulin from A is different from B in six ways and from C in three ways. The insulin from B is different from C in two ways. Which two species appear to be most closely related? Explain your answer.

To determine which two species appear to be most closely related based on the differences in insulin molecules, we need to compare the number of differences between each pair of species. Let's break down the information given in the question:

1. The insulin from species A is different from species B in six ways.
2. The insulin from species A is different from species C in three ways.
3. The insulin from species B is different from species C in two ways.

Based on this information, we can construct a comparison table:

Species Pair | Number of Differences
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A vs. B | 6
A vs. C | 3
B vs. C | 2

From the comparison table, we can observe that species A and species B have the highest number of differences (six). This suggests a greater genetic divergence between species A and B compared to the other pairs.

On the other hand, species A and species C have a smaller number of differences (three), while species B and species C have an even smaller number of differences (two). This indicates that species A and species C, as well as species B and species C, have a relatively lower genetic divergence when compared to species A and species B.

Therefore, based on the given information, we can infer that species A and species C appear to be most closely related, as they share fewer differences in their insulin molecules compared to the other species pairs.

To determine which two species appear to be most closely related based on the analysis of insulin molecules, let's consider the information provided:

1. Species A: Insulin from species A is different from species B in six ways and from species C in three ways.

2. Species B: Insulin from species B is different from species C in two ways.

Based on this information, we can conclude that species A and B are more closely related compared to species A and C or B and C. The reason behind this conclusion is that the number of differences observed between species A and B (six differences) is higher than the number of differences between species A and C (three differences) or B and C (two differences).

The higher number of differences between insulin from species A and B suggests that they have undergone fewer changes over time, indicating a closer genetic relationship. On the other hand, species A and C, as well as species B and C, have fewer differences, indicating a relatively more distant genetic relationship.

Thus, based on the provided information, species A and B appear to be most closely related.