Objective: SWBAT build a histogram in order to display the variation of traits that exist in a single population.
Do Now:
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Question 1
1.
Think about what you have learned so far about populations in general and the rough-skinned newt population that has lots of predators in the park.
What prediction would you make about the poison-level traits in this population? Explain.
Guided Notes:
Vocabulary:
1. Distribution: the number of individuals with each trait in a population
2. Histogram: a graph that uses bars to show how characteristics or values are distributed within a group
3. Population: a graph that uses bars to show how characteristics or values are distributed within a group
4. Trait: a specific characteristic of an individual organism
5. Variation: any difference in traits between individual organisms
6. Abiotic: not living organisms
7. Biotic: living organisms
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Question 2
2.
Video: Histograms
Check Your Understanding
Draggable item
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Corresponding Item
Differences in neck length, color, and fur are all examples of how traits can have ______________________________ within a population.
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Traits
____________________________ help scientists easily see the traits in a poplation.
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Variation
Fur, Color, Neck length, are all examples of different __________
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Histograms
__________________________ of traits within a population help describe any changes or differences in group.
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Distribution
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Question 3
3.
Why are histograms helpful?
"I think histograms are helpful because ... "
(Think: how do histogramps help you understand a population?)
Practice:
Unit 8: Natural Selection
Chapter 1: Environmental Change and Trait Distribution
Lesson 1.3: Exploring Variation and Distribution in Populations
Complete each mission in the Sim by adjusting the trait-level and variation sliders. Zoom in to the environment to observe the individual organisms. draw the histogram of each mission, then mark each mission as complete as you go.
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Question 4
4.
Complete the four chellenges below
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Question 5
5.
How can histograms be used to help describe a population?
CFS:
Accurately identifies relationship and trends in the data set
Accurately describes the relationship between different variables in a population
"I think histograms are helpful because ... "
(Think: how do histogramps help you understand a population?)
Exit Ticket:
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Question 6
6.
Draw the following histograms with a population of 12 individuals on the graphs plots below: