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
Context:
Midway through a course in Evolution, Ecology, Animal Behavior,
or Introductory Biology
Background:
Variation, Inheritance, Fitness, Natural Selection, and Adaptation
© Dan Perlman Ecolibrary.org
Learning Goal:Understand a long-standing
problem in evolutionary biology
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
Write down the first three words or phrases that come to mind
when you hear “natural selection”.
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.
Is the trait advantageous for the individual?
Could it have evolved by natural selection?
Explain why or why not.
Trait: ClawsAdvantageous?Natural selection?
© Dan Perlman Ecolibrary.org
Trait: Flower colorAdvantageous?Natural selection?
© Dan Perlman Ecolibrary.org
Trait: Alarm callingAdvantageous?Natural selection?
© Ron Wolf flickr.com
Altruism: a trait or behavior that reduces an individual’s fitness and increases another individual’s fitness
Trait: SterilityAdvantageous?Natural selection?
© Dan Perlman Ecolibrary.org
1-minute paper:Define altruism and explain why it is a complication for evolution
by natural selection.
© Dan Perlman Ecolibrary.org
Learning Objectives:1. Define altruism2. Explain why altruism is a complication for evolution by natural selection
© Dan Perlman Ecolibrary.org
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