Task 9: Mass Extinctions Introduction: In this report I will talk to you about the 5 mass extinctions that have happened on earth over the past 434 million years. I will also talk to you about the effects of the current mass extinction. The last things i will show is a list of 10 recently extinct species and 10 endangered species. Number 1: The Ordovician Silurian Extinction This extinction happened about 439 million years ago‚ because of a drop in sea levels as glaciers formed. An ice age has been
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Preventing a Species from Extinction Whether should people prevent a species from being extinct or not seems not a controversial topic. Nowadays‚ a lot of people will agree on protecting endangered species. However‚ most people still have some questions. Why should people prevent a species from extinction? Is it Important? What can humans get from protecting rare species? We can answer these questions from three aspects. People should prevent a species from extinction because humans have the responsibility
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extinction is the end of an organism or of a group of organisms (taxon)‚ normally a species. Ordovician-Silurian extinction‚ global extinction event occurring during the Hirnantian Age (445.6 million to 443.7 million years ago) of the Ordovician Period and the subsequent Rhuddanian Age (443.7 million to 439 million years ago) of the Silurian Period that eliminated an estimated 85 percent of all Ordovician species. This extinction interval ranks second in severity to the one that occurred at the
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COMPARATIVE ANATOMY OF VERTEBRATES For the past years‚ extinction is still the major concern of most scientists‚ a problem and phenomenon that encompass all living organisms here on Earth. But do we all know how extinction happens and what are its causes? Just like the topic shared by Mr. Vance Vredenberg concerning the unusual decline in frog’s population‚ extinction is really something anyone should be aware of. According to him‚ extinction of organisms may be caused by any of the following: habitat
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the four‚ I chose to watch the one titled "Tedx: De Extinction: a game changer for conservation biology. The featured presenter is Mr. Stanley Temple‚ a noted conservation biologist who has experience in the preservation of several species. The video was posted to youtube.com by Tedx Talks. Mr. Stanley begins his lecture by stating in his early childhood he was interested in the conservation of animals. This was the driving force for his adult life‚ and career. As he is talking‚ he has infographics
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What is de extinction? De extinction is bringing a species that has gone extinct back to life. De extinction has its pros and cons‚ but it is probably more beneficial for the environment than not. Have you decided if it is good or bad? Most people think of dinosaurs when the here the word de-extinction‚ but it’s not just dinosaurs. It’s all kinds of different species. We can’t say that something is bad if we’ve never seen it or witnessed it’s actions. So who’s to say that de extinction is a bad thing
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The mass extinction of dinosaurs is still a mystery today but their are many theories supporting how and why approximately 70% of all living species on earth suddenly became extinct including dinosaurs‚ 66 million years ago. The most common and realistic theory is the astroid impact theory when a astroid 6-15 km in diameter hit earth with the force of five billion atomic bombs. Another possible theory is climate change‚ the dinosaurs didn’t adapt fast enough to the climate when it was changing and
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Extinction at Its Best While one tends to have the general idea as to what’s happening around the world‚ it isn’t until someone comes around and tells you exactly what’s going on that you become truly aware. This thought was the first to cross my mind while I was reading The Sixth Extinction: An Unnatural History by Elizabeth Kolbert. Before getting into the details of this book review‚ I would like to preface it by saying that before beginning this class I had an idea of what was happening around
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The Sixth Extinction According to the information given by Niles Eldredge‚ about 30‚000 species go extinct annually. The first five major extinctions that have happened in the past were due to natural causes. The first started with severe and sudden global cooling and lost 25% of families. The second happened near the end of the Devonian Period and may or may not have been the result of a global climate change of which 19% of families were lost. Evidence suggests that a bolide impact similar
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Most humans are scared of bees‚ but bees are vital in many ways. The extinction of bees can cause a huge environmental impact‚ just like the extinction of any creature‚ but what would happen? I love bees‚ but many people kill bees because they are afraid of them‚ but my grandfather kept bees and there was nothing to be afraid of. Many people don’t believe that bees are so nice because of their experiences of stinging‚ but what really is the truth? How do bees interact with humans? Should we
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