question 18 of 20 refer to the table. individuals or populations of a taxon of mice are collected from various locations at 10 - km distance intervals. they are brought back to the lab where mice from different populations are mated. the percentage of crosses that are successful is recorded for each population, along with the percentage of offspring that are fertile from each cross. the data are shown in the table.

| distance (km) | percentage of crosses that are successful (average) | percentage of fertile offspring from successful crosses (average) |
| ---- | ---- | ---- |
| 0 (same locale) | 80 | 95 |
| 10 | 72 | 86 |
| 20 | 61 | 80 |
| 30 | 52 | 73 |
| 40 | 43 | 61 |

which statement about the data shown is most accurate?
prezygotic and postzygotic isolation are increasing at about the same rate with increasing geographic distance.
prezygotic and postzygotic isolation are decreasing at about the same rate with increasing geographic distance.
the extent of prezygotic isolation decreases roughly linearly with increasing geographic distance, but postzygotic isolation does not change with distance.
the extent of postzygotic isolation increases roughly linearly with increasing geographic distance, but prezygotic isolation does not change with distance.
the extent of prezygotic isolation increases roughly linearly with increasing geographic distance, but postzygotic isolation does not change with distance.

Question

question 18 of 20 > refer to the table. individuals or populations of a taxon of mice are collected from various locations at 10 - km distance intervals. they are brought back to the lab where mice from different populations are mated. the percentage of crosses that are successful is recorded for each population, along with the percentage of offspring that are fertile from each cross. the data are shown in the table.

| distance (km) | percentage of crosses that are successful (average) | percentage of fertile offspring from successful crosses (average) |
| ---- | ---- | ---- |
| 0 (same locale) | 80 | 95 |
| 10 | 72 | 86 |
| 20 | 61 | 80 |
| 30 | 52 | 73 |
| 40 | 43 | 61 |

which statement about the data shown is most accurate?
prezygotic and postzygotic isolation are increasing at about the same rate with increasing geographic distance.
prezygotic and postzygotic isolation are decreasing at about the same rate with increasing geographic distance.
the extent of prezygotic isolation decreases roughly linearly with increasing geographic distance, but postzygotic isolation does not change with distance.
the extent of postzygotic isolation increases roughly linearly with increasing geographic distance, but prezygotic isolation does not change with distance.
the extent of prezygotic isolation increases roughly linearly with increasing geographic distance, but postzygotic isolation does not change with distance.

Accepted Answer

# Brief Explanations:
Prezygotic isolation is related to the success of crosses (less success means more prezygotic isolation), and post - zygotic isolation is related to the fertility of offspring from successful crosses (less fertility means more post - zygotic isolation). As the distance increases, the percentage of successful crosses decreases (from 80 at 0 km to 43 at 40 km) and the percentage of fertile offspring from successful crosses also decreases (from 95 at 0 km to 61 at 40 km), indicating that both prezygotic and postzygotic isolation are increasing with increasing geographic distance.
# Answer:
Prezygotic and postzygotic isolation are increasing at about the same rate with increasing geographic distance.

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