Human Anatomy & Physiology (11th Edition)
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ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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Bats mostly hunt insects at night. They are able to determine the distance and speed of any prey they are chasing, which has helped them to become excellent nocturnal predators. One potential prey, the tiger moth, has developed two separate methods of evading predation.
First, tiger moths emit a toxin that is distasteful to bats, birds, and most other vertebrate predators. Second, they use an organ called a "tymbal" to create a series of high-pitched clicks that only bats can hear, and which identify the tiger moths as something the bats don't like to eat. Bats who prey on tiger moths discover they don't taste very good, learn to identify tiger moths by their clicks, and avoid eating them. Use this information to answer the questions below.
Question 1: The scenario above describes a distinct evolutionary interaction. What is it?Can you explain?
Question 2: Why is it necessary for the moth to produce both a tymbal click and a toxin? Why not just a toxin? Do you think there are moth species that produce only tymbal clicks, and why or why not?
Question 3: What might you expect to happen in the future to the bat populations that hunt tiger moths?
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