evolution teaching tidbit njit bhavani balasubramanian maria stanko ellen wisner brandeis university...
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Evolution Teaching TidbitNJIT
Bhavani BalasubramanianMaria StankoEllen Wisner
Brandeis UniversityMelissa Kosinski-Collins
Jim MorrisDan Perlman
© Dan Perlman Ecolibrary.org
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Context:
Midway through a course in Evolution, Ecology, Animal Behavior,
or Introductory Biology
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Background:
Variation, Inheritance, Fitness, Natural Selection, and Adaptation
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Learning Goal:Understand a long-standing
problem in evolutionary biology
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Learning Objectives:By the end of this tidbit,
you should be able to
1. Define altruism2. Explain why altruism is a complication for evolution
by natural selection
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Write down the first three words or phrases that come to mind
when you hear “natural selection”.
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Natural Selection
If a trait is advantageous for the individual in terms of survival
and/or reproduction, it will become more common in the population over time by natural selection.
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Is the trait advantageous for the individual?
Could it have evolved by natural selection?
Explain why or why not.
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Trait: ClawsAdvantageous?Natural selection?
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Trait: Flower colorAdvantageous?Natural selection?
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Trait: Alarm callingAdvantageous?Natural selection?
© Ron Wolf flickr.com
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Altruism: a trait or behavior that reduces an individual’s fitness and increases another individual’s fitness
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Trait: SterilityAdvantageous?Natural selection?
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1-minute paper:Define altruism and explain why it is a complication for evolution
by natural selection.
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© Dan Perlman Ecolibrary.org
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Learning Objectives:1. Define altruism2. Explain why altruism is a complication for evolution by natural selection
© Dan Perlman Ecolibrary.org
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