hard · Enhanced ACT science
A study measured how population size of a rabbit colony changed over time under two conditions: with and without a natural predator present.
| Year | Population (no predator) | Population (with predator) |
| :--- | :--- | :--- |
| 0 | 50 | 50 |
| 1 | 95 | 70 |
| 2 | 180 | 90 |
| 3 | 340 | 95 |
| 4 | 600 | 92 |
| 5 | 980 | 88 |
Based on the data, which statement best describes the effect of the predator on the rabbit population's growth pattern?
- Without a predator, growth levels off after year 3; with a predator, growth remains exponential through year 5
- Without a predator, growth is roughly exponential; with a predator, it levels off then dips
- The predator has no clear effect, since both populations rise early on
- The predator causes the population to decline continuously from the start
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