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NS: 1.4 (3/22)

Last updated over 2 years ago
10 questions

Objective: SWBAT analyze a histogram and environmental factors in order to explain why the frequency of non-adaptive and adaptive traits in a population change over time.

Do Now:

0

Which histogram shows a population that’s all one color?

0

Which histogram shows a population with a lot of variation?

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Which histogram shows a population with mostly yellow ostrilopes and some variation?

0

Which histogram shows the same variation as histogram B but a different distribution of traits?

Guided Notes:

Vocabulary:
1. Abiotic: not living organisms
2. Biotic: living organisms
3. Adaptive Traits: a trait that makes it more likely that an individual will survive in a specific environment
4. Non-adaptive Traits: a trait that makes it less likely that an individual will survive in a specific environment
0

What information can you gather about the two generations below?

0

Was there variation in Generation 1?

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Was there variation in Generation 2?

Practice:

Log into:
Amplify Science
Unit 8: Natural Selection
Chapter 1: Environmental Change and Trait Distribution
Lesson 1.4: Investigating changes in trait distribution

Goal:
·  Observe why the distribution of fur traits changes over time.
Tips:
·  Press the Reset button and repeat your test to see if you observe the same changes each time.
0

Do:
·  Open the Natural Selection Simulation and open the mode: Fur and Temperature A.
·  Change the temperature of the environment to cold (Level 1) by moving the    Temperature slider.
·  Press RUN and observe the population for at least 50 generations.
·  Press ANALYZE and compare starting and ending histograms.

2

Why do you think the distribution of fur traits changed over time?
CFS:
  • accurately uses visual data to draw conclusions on population variations
  • describes the cause and effect relationship between environmental factors and species traits

Exit Ticket:


1

Predicting Fur Traits in a Cooling Environment
Use the Modeling Tool activity: Fur and Temperature, Population B to show your prediction about how the distribution of traits in Population B will change as a result of the environment becoming cold.

Goal:
Predict how and why Population B will change after the environment changes from warm to cold.
Do:
Analyze Histogram 1 and label that histogram with any Trait labels that apply.
• Predict Histogram 2 by shading in the bars for the different trait levels.


Predict the traits in Generation 2 when the environment changes from WARM to COLD