Question
This table shows the same data about the population of pond snails. Use the data to answer the question below.
Data about a population of pond snails
Point in time Number with narrow shells Number with round shells Percentage with narrow shells Percentage with round shells
Start 358 42 89.5% 10.5%
End 69 131 34.5% 65.5%
How did this population change over this time period? Select all the statements that apply.
Answers
GPT-4o mini
Based on the data provided for the population of pond snails, the following statements can be made about how the population changed over the indicated time period:
1. **The number of pond snails with narrow shells decreased.**
- Starting with 358 narrow-shell snails, the number decreased to 69, indicating a significant drop.
2. **The number of pond snails with round shells increased.**
- The number of round-shell snails rose from 42 to 131, demonstrating growth in this category.
3. **The percentage of pond snails with narrow shells decreased.**
- The percentage dropped from 89.5% at the start to 34.5% at the end.
4. **The percentage of pond snails with round shells increased.**
- The percentage increased from 10.5% at the start to 65.5% at the end.
These changes suggest a significant shift in the population dynamics of the pond snails, with a notable decline in narrow-shell snails and a corresponding increase in round-shell snails.
1. **The number of pond snails with narrow shells decreased.**
- Starting with 358 narrow-shell snails, the number decreased to 69, indicating a significant drop.
2. **The number of pond snails with round shells increased.**
- The number of round-shell snails rose from 42 to 131, demonstrating growth in this category.
3. **The percentage of pond snails with narrow shells decreased.**
- The percentage dropped from 89.5% at the start to 34.5% at the end.
4. **The percentage of pond snails with round shells increased.**
- The percentage increased from 10.5% at the start to 65.5% at the end.
These changes suggest a significant shift in the population dynamics of the pond snails, with a notable decline in narrow-shell snails and a corresponding increase in round-shell snails.