EBK BIOLOGY
5th Edition
ISBN: 8220101337627
Author: Maier
Publisher: PEARSON
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Chapter 15, Problem 2CTS
Summary Introduction
To review:
The answer to the question 'when it was clear that humans can cause mass extinction, and what precautions as an individual was taken to prevent it?'
Introduction:
The biodiversity is very important for human and wild welfare. The loss of biodiversity comewith major changes to the environment and loss of many important elements of nature. In case, the humans fail to conserve the biodiversity, a mass extinction could occur due to the changes in the environment.
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We are now in 6th mass extinction caused by human. So how to prevent next mass extinction on earth?? Kindly answer this question
We have looked at what the fossil record can tell us about the amazing History of Life on Earth. We've examined the evidence for an early origin for life in the sea, 3800 million years, and investigated how life invaded life about 500 million years. We've also discussed the subsequent boom in life that massively increased biodiversity but also noted how the History of Life is frequently punctuated by mass extinctions. Today we stand on the threshold of a new mass extinction event. The biodiversity that we take for granted and that sustains humans is threatened to a degree only rarely seen in 4500 million years of Earth History.
NOW TO CONCLUDE, ANSWER THE QUESTION.
1. ARE WE ON THE BRINK OF A MASS EXTINCTION? WHAT WOULD BE THE CONSEQUENCES FOR SOCIETY OF LOSING HALF OF ALL SPECIES BY 2100? ARE THERE ACTIONS THAT WE CAN TAKE AS INDIVIDUALS AND AS SOCIETY TO HELP PROTECT LIFE ON EARTH?
(A) What is extinction? How extinction is different from expiration? Explain. (B)List the
five mass extinction episodes occurred in the history of Earth. Characterize the nature and
extent of each extinction episode.
Chapter 15 Solutions
EBK BIOLOGY
Ch. 15 - Prob. 1LTBCh. 15 - Compare and contrast the species interactions of...Ch. 15 - Prob. 3LTBCh. 15 - Current rates of species extinction appear to be...Ch. 15 - According to the generalized species-area curve,...Ch. 15 - Prob. 6LTBCh. 15 - Prob. 7LTBCh. 15 - Which of the following is an example of a...Ch. 15 - Prob. 9LTBCh. 15 - Prob. 10LTB
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- WHAT IS MASS EXTINCTION? HOW DID MASS EXTINCTION EVENTS INFLUENCE EARTH'S HISTORY?arrow_forwardThe term Anthropocene implies that we were the major force of nature prior to 10,000 years ago. our global impact has accelerated greatly during the past couple of centuries. humans have impacted the earth at a planetary scale so severe that we can consider this a new geological epoch. millions of years from now the record of human life will be eradicated. there are more humans than bacteria.arrow_forwardHOW MANY MASS EXTINCTION EVENTS HAS EARTH WITNESSED SO FAR?arrow_forward
- Do you believe were in a mass extinction period right now? Why or why not?arrow_forwardWhich of the following accurately describes the Hadeon Eon? Earth during the Hadeon Eon closely resembled the earth of today. Earth was extremely hot and molten in nature during the Hadeon Eon. Earth contains an oxygen-rich atmosphere that allows photosynthetic organisms to flourish. Life first appeared on Earth during the Hadeon Eon.arrow_forwardAround the time Eukaryotic Cells began to compartmentalize their reactions, and the chloroplast and mitochondria evolved, the atmosphere went through a shift in composition. A new deadly gas became more and more prominent, which likely caused a mass extinction for those organisms that couldn't adapt to its toxicity. The gas was: Nitrogen Sulfuric Acid Oxygen Methanearrow_forward
- Which eon has more events occurring in it? During which eon did life evolve? What is the difference between background extinctions and mass extinctions?arrow_forwardApproximately how long ago did homo sapen (humans) first appear on Earth 2,000 years ago 5-7 million years ago 65 million years ago 150,000 - 200,000 years ago Hominins developed their unique larger brains before acquiring the ability to move on two feet. True False the production of atmospheric oxygen in Earth's environment started with photosynthesis by prokaryotes photosynthesis by multicellular eukaryotes photosynthesis by single celled algae photosynthesis by land plants Homologous structures among animal provide evidence for evolution in that theses structure are all produced by the same gene different in different animals, but are modifications of the same basic structure similar in function, but of different basic structure all different structures within the same speciesarrow_forwardWhat is the “sixth mass extinction event”?arrow_forward
- Throughout Earth’s history, many species, and perhaps even most of the species that ever existed, have become extinct. The causes are numerous: climate change, volcanic activity, the actions of oxygen-producing organisms, changes in carbon dioxide concentration, and even asteroid impacts. Have humans ever caused extinctions?arrow_forward29) The Cretaceous extinction. which was the most recent mass extinction, occurred about 65.5 million years ago. What is the leading hypothesis to explain the Cretaceous extenction? A) The Indian sub-continent collided with the Asian techtonic plate, giving rise to the Hymalayan mountains which altered the jet stream and caused the planet to enter an ice age B) An asteroid about 6 km in diameter collided with Earth, which vaporized the caribbean ocean, set fire to north and south America, and expelled enough dust into the atmosphere to block the sun enough to result in a winter like environment all across the globe for several years C) A new group of predators evolved that were significantly better at capturing prey, to the point that they drove many species (including other predators and eventually themselves) to extinction D) Massive amounts of volcanic activity released tons of CO2, enough to significantly increase the temperature of the planet 30) The Permian extinction, which…arrow_forwardBecause mass extinction is a natural process that may facilitate evolution during the period of thousands to millions of years that follow it, should humans be concerned about the current mass extinction we are causing? Why or why not?arrow_forward
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