Populations Graphs Worksheet - Flying Colors Science - Free Printable

It looks like you've uploaded an image of a "Population Ecology: Population Graphs Worksheet" that includes several questions and graphs related to population dynamics. However, the actual task or specific problem you want me to solve isn't fully visible in the image — it's partially obscured by the cover design.

But based on what’s visible, I can help you analyze and solve Question 1, which appears to be about a graph showing the growth of a fly population over time in a jar. Let's go through it step-by-step.

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🔍 Question 1 (Visible in Image):

> The graph to the right represents the growth of a population of flies in a jar.
>
> a. Which letter best indicates the part of the graph that represents the carrying capacity of the jar?
>
> b. How did you arrive at your answer for 1a?
>
> c. If the food and water in the jar were not refilled, what would you expect to happen to the population graph over time? Explain.

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📊 Graph Analysis:

The graph shows "Fly Population Over Time" with:
- X-axis: Days
- Y-axis: Number of Flies
- A curve that starts low, rises steeply (exponential growth), then levels off into a plateau.

This is a classic logistic growth curve:
- A: Initial slow growth (lag phase)
- B: Rapid exponential growth
- C: Growth slows as resources become limited
- D: Plateau — population stabilizes

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✔ Answers:

#### a. Which letter best indicates the carrying capacity?
➡️ Answer: D

Explanation:
Carrying capacity is the maximum number of individuals an environment can sustainably support. On a logistic growth curve, this is shown by the horizontal plateau where the population stops growing due to limited resources (like food, space, etc.). In this graph, point D marks the top of the curve, indicating the population has reached its maximum sustainable size.

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#### b. How did you arrive at your answer for 1a?
➡️ Answer:
I identified the carrying capacity as the point where the population growth levels off and stops increasing. This happens because the environment (the jar) has limited resources such as food and space. Once these are used up, the population cannot grow further, so it stabilizes. On the graph, this stabilization occurs at point D, making it the carrying capacity.

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#### c. If the food and water in the jar were not refilled, what would you expect to happen to the population graph over time? Explain.
➡️ Answer:
If food and water are not refilled, the population would eventually decline after reaching the carrying capacity.

Explanation:
Even though the population stabilizes at first (due to limited resources), without replenishing food and water, the resources will deplete over time. This would lead to:
- Increased competition
- Higher death rates
- Lower birth rates
- Possible starvation

Eventually, the population would drop below the carrying capacity and could even collapse. So, instead of staying flat at D, the graph would start to decline after some time — forming a dip or downward slope beyond the plateau.

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🧠 Key Concept Recap:

- Carrying Capacity (K): The maximum population size an environment can support indefinitely.
- Logistic Growth Curve: S-shaped curve showing initial rapid growth followed by leveling off at K.
- Limiting Factors: Resources like food, water, space, and waste buildup affect population growth.

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💡 Final Notes:

If you have additional questions from this worksheet (e.g., predator-prey cycles, bull shark population trends), feel free to describe them or upload more details, and I’ll help with those too!

Let me know if you'd like this explanation formatted as a printable answer sheet or need help interpreting other graphs!