Objective: SWBAT describe how an organism’s trait is perpetuated through generations in order to describe natural selection
EXIT TICKET EXEMPLAR:
"The newt population became more poisonous because of the increase in snake population this made newts more prone to being eaten so newts with more poison could protect themselves from snakes eating them. Newts with more poison could protect themselves from snakes, allowing them to live longer and pass down their poision levels to future generations."
Do Now:
Decide which additional claims you think are true, false, or partially true. Read each claim and select from the choices.
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Question 1
1.
Graph 1 (LEFT), What traits are present in the first generation? What traits are present in the second generation?
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Question 2
2.
Graph 2 (RIGHT), What traits are present in the first generation? What traits are present in the second generation?
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Question 3
3.
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
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
Variation: any difference in traits between individual organisms
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Question 4
4.
Part 1: Discussing a Claim About Reproduction
Sherman suggests that reproduction always creates individuals with adaptive traits. Does this seem correct?
Practice:
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Question 5
5.
Hypothesis: Yellow color is adaptive in a Yellow Level 7 environment with carnithons. Do you think all ostrilopes who reproduce will create offspring with the adaptive yellow-color trait? Why or why not?
CFS:
accurately describes the relationship between environmental changes and population variations
describes the cause and effect relationship between environmental factors and species traits
Log into:
Amplify Science
Unit 8: Natural Selection
Chapter 2: Natural Selection and Reproduction
Lesson 2.1: Reproduction and Traits
Goal: Gather evidence to support or refute the claim that reproduction always creates individuals with adaptive traits.
Do:
Open the Natural Selection Simulation and open the mode: Reproduction Claims.
Press RUN to complete the data tables below.
Tips:
Slow down and pause the Sim to carefully observe traits after reproduction.
Reset the Sim between trials.
If the ostrilope you are following gets eaten before it reproduces, select and follow a similar ostrilope.
Trial A Results:
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Question 6
6.
How many of the offspring that you observed had the adaptive trait of Yellow Color 7? (check one)
Trial B Results:
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Question 7
7.
How many of the offspring that you observed had the adaptive trait of Yellow Color 7? (check one)
Exit Ticket:
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Question 8
8.
Does the data you collected support or refute the following claim? How does your data support or refute it?
Claim: Reproduction always creates individuals with adaptive traits.
CFS:
accurately describes the relationship between environmental changes and population variations
describes the cause and effect relationship between environmental factors and species traits
Accurately cites evidence from the most relevant source
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Question 9
9.
Analysis
As more and more generations pass, what do you expect to see in the ostrilope population who live in a Yellow Level 7-9 environment?
Accurately label the ending histogram based on trait characteristics.
CFS:
- identify the existing traits in the final generation
- identify the adaptive traits in the final generation