Objective: SWBAT analyze evidence in order to explain how the newt population became more poisonous over time.
Do Now:
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Question 1
1.
Why did the population change its traits to have less fur?
Exit Ticket Review:
Why do you think yellow is not adaptive in the yellow environment shown in the second graph?
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Question 2
2.
Why do blue ostrilopes surive in the second environment?
Guided Notes:
Vocabulary:
Adaptive trait: a trait that makes it more likely that an individual will survive in a specific environment
Non-adaptive trait: a trait that makes it less likely that an individual will survive in a specific environment
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Question 3
3.
Actually, Sherman, there are more black moths than white ones because . . .
CFS:
accurately describes the relationship between environmental changes and population variations
describes the cause and effect relationship between environmental factors and species traits
Practice:
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Question 4
4.
Based on the information above, how can you explain why the distribution of traits changed in this population?
Use the words; adaptive trait, distribution, environment, non-adaptive trait, variation
CFS:
accurately describes the relationship between environmental changes and population variations
accurately describes the cause and effect relationship between environmental factors and species traits
accurately cites evidence
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Question 5
5.
Based on the information above, how can you explain why there are surviving traits in the first graph but no surviving traits in the second?
Use the words; adaptive trait, distribution, environment, non-adaptive trait, variation
CFS:
accurately describes the relationship between environmental changes and population variations
accurately describes the cause and effect relationship between environmental factors and species traits
accurately cites evidence
Exit Ticket:
Consider these two facts:
Since the time when the data was collected 50 generations ago, the distribution of traits in the population has shifted significantly. Now, many more individuals have Poison Level 10.
Since the time the data was collected 50 generations ago, snakes became part of the newts’ environment.
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Question 6
6.
Dr. Young would like to know about your progress in solving the mystery about the rough skinned newts. In the space below, answer the Chapter 1 Question: What caused this newt population to become more poisonous?
Use what you have learned so far to consider these claims:
Claim 1: Individual newts became more poisonous because they wanted to.
Claim 2: The newt population became more poisonous because of something in the environment.
Revised Claim 2: The newt population became more poisonous because the snakes in this environment caused poison to be an adaptive trait.
Choose one or more claims to support with evidence and reasoning. You may also want to explain why one or more of the claims is definitely not correct.
Use the words; adaptive trait, distribution, environment, non-adaptive trait, variation