Question
This passage describes malathion resistance in oriental fruit flies.
an oriental fruit fly
Oriental fruit flies eat many types of fruit. Farmers often cover their fruit crops in insect-killing chemicals to protect the crops from fruit flies.
Malathion (mal-uh-THAHY-on) is one chemical used to protect fruit from oriental fruit flies. However, some fruit flies have a trait called malathion resistance. These flies can eat fruits that are covered in malathion without being poisoned.
The table below describes a possible population of oriental fruit flies at the start of a period of time and at the end of that period. The table shows the malathion resistance trait in the population at each point in time.
Complete the table. Write the exact answers as whole numbers or decimals.
Data about a population of oriental fruit flies
Point in time Number with malathion resistance Number without malathion resistance Percentage with malathion resistance Percentage without malathion resistance
Start 259 441
%
%
End 246 154
%
%
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Introduction to natural selection - Eighth grade
an oriental fruit fly
Oriental fruit flies eat many types of fruit. Farmers often cover their fruit crops in insect-killing chemicals to protect the crops from fruit flies.
Malathion (mal-uh-THAHY-on) is one chemical used to protect fruit from oriental fruit flies. However, some fruit flies have a trait called malathion resistance. These flies can eat fruits that are covered in malathion without being poisoned.
The table below describes a possible population of oriental fruit flies at the start of a period of time and at the end of that period. The table shows the malathion resistance trait in the population at each point in time.
Complete the table. Write the exact answers as whole numbers or decimals.
Data about a population of oriental fruit flies
Point in time Number with malathion resistance Number without malathion resistance Percentage with malathion resistance Percentage without malathion resistance
Start 259 441
%
%
End 246 154
%
%
Questions
answered
8
Time
elapsed
00 07 05
hr min sec
Challenge
Stage 3 of 3
Get 6 correct in a row
Need a break?
Scratchpad
Work it out
Not feeling ready yet? This can help:
Skill IconIntroduction to natural selection (17)
Skill Icon
Introduction to natural selection - Eighth grade
Answers
GPT-4o mini
To complete the table, we need to calculate the percentage of oriental fruit flies with and without malathion resistance at both the start and the end of the period.
**Calculating the percentages**:
1. **Start**:
- Total flies = Number with malathion resistance + Number without malathion resistance
- Total flies = 259 + 441 = 700
- Percentage with malathion resistance = (Number with malathion resistance / Total flies) * 100
- Percentage with malathion resistance = (259 / 700) * 100 ≈ 37.00%
- Percentage without malathion resistance = (Number without malathion resistance / Total flies) * 100
- Percentage without malathion resistance = (441 / 700) * 100 ≈ 63.00%
2. **End**:
- Total flies = Number with malathion resistance + Number without malathion resistance
- Total flies = 246 + 154 = 400
- Percentage with malathion resistance = (Number with malathion resistance / Total flies) * 100
- Percentage with malathion resistance = (246 / 400) * 100 = 61.50%
- Percentage without malathion resistance = (Number without malathion resistance / Total flies) * 100
- Percentage without malathion resistance = (154 / 400) * 100 = 38.50%
Now, we can fill in the table with the calculated values:
| Point in time | Number with malathion resistance | Number without malathion resistance | Percentage with malathion resistance | Percentage without malathion resistance |
|---------------|----------------------------------|-------------------------------------|-------------------------------------|----------------------------------------|
| Start | 259 | 441 | 37.00% | 63.00% |
| End | 246 | 154 | 61.50% | 38.50% |
**Calculating the percentages**:
1. **Start**:
- Total flies = Number with malathion resistance + Number without malathion resistance
- Total flies = 259 + 441 = 700
- Percentage with malathion resistance = (Number with malathion resistance / Total flies) * 100
- Percentage with malathion resistance = (259 / 700) * 100 ≈ 37.00%
- Percentage without malathion resistance = (Number without malathion resistance / Total flies) * 100
- Percentage without malathion resistance = (441 / 700) * 100 ≈ 63.00%
2. **End**:
- Total flies = Number with malathion resistance + Number without malathion resistance
- Total flies = 246 + 154 = 400
- Percentage with malathion resistance = (Number with malathion resistance / Total flies) * 100
- Percentage with malathion resistance = (246 / 400) * 100 = 61.50%
- Percentage without malathion resistance = (Number without malathion resistance / Total flies) * 100
- Percentage without malathion resistance = (154 / 400) * 100 = 38.50%
Now, we can fill in the table with the calculated values:
| Point in time | Number with malathion resistance | Number without malathion resistance | Percentage with malathion resistance | Percentage without malathion resistance |
|---------------|----------------------------------|-------------------------------------|-------------------------------------|----------------------------------------|
| Start | 259 | 441 | 37.00% | 63.00% |
| End | 246 | 154 | 61.50% | 38.50% |