Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
A small community that is heavily infested with mosquitoes was sprayed weekly with the insecticide DDT for several months. Daily counts providing information on mosquito population size are represented in the graph below.
Provide a biological explanation for the changes in the mosquito population over time.
Use the terms: insecticide resistance/resistant, natural selection, favorable trait, reproduce, mutation/sexual reproduction
Use this sentence starter: At the beginning the daily mosquito count (increased/decreased) until month _, then it started to (increase/decrease).
This occurred because..
Use NUMBERS FROM THE GRAPH

Transcribed Image Text:**Graph on Daily Mosquito Count Over Time**
The graph presented depicts the variation of mosquito populations over a period of eight months. The horizontal axis represents time in months, ranging from 0 to 8 months. The vertical axis shows the daily mosquito count, ranging from 0 to 10,000.
**Graph Description and Analysis:**
1. **Initial Count (Month 0 to Month 1):**
- At the start (Month 0), the mosquito population is high, nearing 10,000.
- There is a sharp decline in the population soon after, with the count dropping to a little below 2,500 by the end of Month 1.
2. **Recovery Phase (Month 2 to Month 4):**
- An initial low phase (between Month 1 and Month 2) is noticed where the mosquito count remains fairly steady.
- Post Month 2, the mosquito population begins to rise gradually, reaching around 5,000 by Month 3.
- By the end of Month 4, the mosquito count continues to gradually increase and surpasses 7,500.
3. **Peak and Stability Phase (Month 5 to Month 8):**
- From Month 5 to Month 6, there is a significant upward trend where the mosquito count increases sharply, peaking near 10,000.
- Subsequently, from Month 6 through to Month 8, the mosquito count levels out, indicating a period of stability at the peak count near 10,000.
Understanding this trend is crucial for preparing interventions and preventive measures during peak mosquito population periods. This graph can be an essential tool for public health officials, entomologists, and environmental scientists in devising strategies to control mosquito populations and mitigate potential health risks associated with them.
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