TPO64听力Lecture3原文+MP3+题目+答案下载

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TPO64阅读真题+题目+答案下载：The Development of Complex Societies in Ancient Mexico

TPO64阅读真题+题目+答案下载：Auditory Perception in Infancy

TPO64阅读真题+题目+答案下载：Characteristics of Pterosaurs

TPO64听力Lecture3原文+MP3+题目+答案下载

TPO64听力Lecture3原文

Listen to part of a lecture in a zoology class.

Professor, we were talking about the principles of classification, how some types of animals are related to other animals and similarities between different kinds of animals, but I was reading the textbook last night, and it mentioned that there are related to each other even though they have some major dissimilarities. Could you talk about that a little bit?

Sure. And I’m glad you brought that up. But first out of curiosity, are any of you from the southwestern part of the United States? No? Well, then I’m probably explaining something a little new to most of you because when you asked about that, the example that jumps to my mind is one type of lizard the Gila monster.

Gila monsters pretty much all live in the desert areas of the southwestern United States and in Northern Mexico, parts of Northern Mexico. The Gila monster looks and acts a lot like other lizards but in one key way it seems different. I mean, Gila monsters would be classified as lizards because, well, the Gila monster and all lizards share certain characteristics. Some of the features of the skull, the jaw, and other parts of the skeleton, all lizards inherit these features from a common ancestor. That’s why they are classified as lizards. Most lizards also have things like four legs, a long tail, skin covered in scales, let’s see, a triangular head, and, yes, Michelle?

You know, there’s actually an illustration of one on, let’s see, page 12 of our handouts.

Thanks Michelle. Let’s all take a look. Basically it’s a fairly large creature, I guess about two feet long. It has, well, you can see those spots or blotches all along its body. Mike.

You said that Gila monsters are different from most other lizards, but what you just described Thanks Michelle. Let’s all take a look. Basically it’s a fairly large creature, I guess about two feet long. It has, well, you can see those spots or blotches all along its body. Mike.

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