"Into the wild" PPT

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"Into the wild" PPT

Part One: Topic Reading·Textbook Links

Many people speculate that the extinction of animals is due to climate. In fact, sometimes humans are the biggest threat to animal survival. We must protect animals and plants and live in harmony with them.

Climate change, not human hunting, may have wiped out the thylacine (thylacine), according to a new study based on DNA from thylacines' bones.

The meateating marsupials (marsupials) died out on mainland Australia a few thousand years ago, but survived in Tasmania, an island of southeast Australia separated from the mainland, until the 1930s. Until then, scientists had believed the cause of this mainland extinction (extinct) was increased activity from native Australians and dingoes (Australian wild dogs)．

Scientists behind the University of Adelaide study, which was published in the Journal of Biogeography on Thursday, collected 51 new thylacine DNA samples from fossil bones and museum skins — the largest data set of thylacine DNA to date. The paper concluded that climate change starting about 4,000 years ago — in particular drier seasons caused by the weather systems known as El Niño — Southern Oscillation — was likely the main cause of the mainland extinction.

The ancient DNA showed that the mainland extinction of thylacines was rapid, and not the result of loss of genetic diversity. There was also evidence of a population crash in thylacines in Tasmania at the same period of time, reducing their numbers and genetic diversity.

Associate Professor Jeremy Austin said Tasmania would have been protected from mainland Australia's warmer, drier climate due to its higher rainfall. He argued that climate change was “the only thing that could have caused, or at least started, an extinction on the mainland and caused a population crash in Tasmania.”

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《Into the wild》Section C PPT:

"Into the wild" Section C PPT The first part of the content: Topic Vocabulary Vocabulary 1 observe v. see, observe; obey, follow (laws, customs, etc.); celebrate [original sentence in the textbook] ...you can observe animals in their nat ..

《Into the wild》Section B PPT:

"Into the wild" Section B PPT The first part of the content: Question group practice comprehension method Topic vocabulary Vocabulary 1 Animal idioms [Key points must be remembered] Kill two birds with one stone. Kill two birds with one stone. / Kill two birds with one stone. When the cats..

《Into the wild》Section A PPT:

"Into the wild" Section A PPT The first part of the content: Core vocabulary Vocabulary 1 seek vt. (sought, sought) seek, request; seek; try [original sentence in the textbook] They migrate to find food, seek a partner..

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Update Time: 2024-07-01

This template belongs to English courseware High School English Compulsory Course 1, Foreign Language Research Edition industry PPT template

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