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Biology homework task

Homework 11

Watch each of the following linked short videos (~5min each) and answer the questions.

How wolves change rivers:

How whales change climate:

1. What is a trophic cascade?

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.

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