[高级英语]unit4 - zoology - student version

Unit Four Zoology

Alarm Calls

Most animals have predators that they have to worry about, and with social animals, one of the methods that they use is something called an alarm call. It is a method that animals use to signal to and communicate with each other, and many primates and birds have elaborate alarm calls for approaching predators. And different calls may be used for different types of predators. So as an example, for certain monkeys, there’s a specific call for snakes, leopards, and eagles. And each of the calls elicits different responses from the group. Though it is a vital part of survival, there are also certain negatives that come with this type of system as well.

Now, let’s listen to a lecture on this subject. Note-taking:

Question: Using examples from the lecture, explain the negative effects of the alarm calls.

5. It’s your turn

5.1 Language Enhancement 5.1.1 Find the synonym warning gain combine provide own 9 / 11

A striking use comb furnish process B alert gather synthesize apply present C alarming inquire peck breed possess D mobbing acquire blend polish protect Unit Four Zoology

5.1.2 Paraphrase the following sentences

Having the most species of wild mammals to begin with, and losing the fewest to Original extinction in the last 40,000 years, Eurasia has generated the most candidates for Sentence

domestication.

Paraphrase

Original A candidate for domestication must be primarily a herbivore because it takes less plant Sentence

biomass to feed a plant eater than it does to feed a carnivore that consumes plant eaters.

Paraphrase

Original Sentence During mobbing, the prey turns the tables and attacks the predator.

Paraphrase

Original Moths that camouflage themselves to match a leaf stand a good chance of not being Sentence

seen by moth-eating birds, unless, of course, the moths become so populous that a bird is likely to come across one by accident.

Paraphrase

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Unit Four Zoology

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