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Biology homework task
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Homework 11
Watch each of the following linked short videos (~5min each) and answer the questions.
How wolves change rivers: https://youtu.be/ysa5OBhXz-Q
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How whales change climate: https://youtu.be/M18HxXve3CM
1. What is a trophic cascade?
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2. What is a keystone species?
3. Considering the information in the videos and material from lecture, compose a response to someone who claims that “warming the oceans a few degrees” or “causing the extinction of a few animals” couldn’t have any major or long-term consequences, either to the overall system or specifically to humans.
