Human Biology: Concepts and Current Issues Plus Mastering Biology with Pearson eText -- Access Card Package (8th Edition)
8th Edition
ISBN: 9780134042237
Author: Michael D. Johnson
Publisher: PEARSON
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Textbook Question
Chapter 22, Problem 7CR
Explain how rising atmospheric concentrations of oxygen affected life on Earth.
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What were the consequences of an “oxygenated” Earth to life and to the atmosphere itself? (explain constructively)
Explain what caused the increase in oxygen in Earth’s air andwaters
Explain how living things recycle oxygen in Earth’s atmosphere.
Chapter 22 Solutions
Human Biology: Concepts and Current Issues Plus Mastering Biology with Pearson eText -- Access Card Package (8th Edition)
Ch. 22 - Do you think the skeletons of Liang Bua Cave...Ch. 22 - Is it important that we try to discover the...Ch. 22 - Describe the three key elements of evolution.Ch. 22 - Explain how a fossil is created.Ch. 22 - List some of the main sources of evidence for...Ch. 22 - Prob. 4CRCh. 22 - Prob. 5CRCh. 22 - Prob. 6CRCh. 22 - Explain how rising atmospheric concentrations of...Ch. 22 - List the features that make Hominidae different...
Ch. 22 -
9. Describe the origins of Homo sapiens.
Ch. 22 - Explain why racial differences may disappear...Ch. 22 - Prob. 1TYCh. 22 - Prob. 2TYCh. 22 - Prob. 3TYCh. 22 - Vestigial structures, homologous structures, and...Ch. 22 -
5. Which of the following statements about...Ch. 22 - Which of the following best describes evolutionary...Ch. 22 - Prob. 7TYCh. 22 - Genetic drift is most likely to affect: a. every...Ch. 22 -
9. Which of the following would be described as...Ch. 22 - Which of the following statements is true? a. Mass...Ch. 22 - In what order did events occur that led to life on...Ch. 22 - Prob. 12TYCh. 22 -
13. Which of the following statements about the...Ch. 22 - Prob. 14TYCh. 22 - Which of the following is not believed to be a...Ch. 22 - Prob. 1AWKCh. 22 - Prob. 2AWKCh. 22 - Critics of evolution often charge, correctly as it...Ch. 22 - Prob. 4AWKCh. 22 - Prob. 5AWKCh. 22 - It is believed that humans evolved in Africa and...Ch. 22 - Prob. 7AWKCh. 22 - Of all the great evolutionary advances of life on...
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- Why is oxygen important for animals to survive? please provide scientific explanationsarrow_forwardDescribe what the early atmosphere was like and what cause a large amount of oxygen (O2) to build up in the atmosphere?arrow_forward"Life has shaped earth just by existing”. In 2-3 sentences, explain this statement briefly by citing an example.arrow_forward
- In a discussion, a student makes the following statement regarding the cause of global warming: “The sun’s rays penetrate the atmosphere through the ozone hole and heat up the atmosphere and the surface, thereby causing global warming.” Is the student correct? Why or why not? In your response, briefly explain both phenomena.arrow_forwardFossils of a microscopic organism are found in rocks determined to be from a past era of time. Identify TWO types of evidence that would help answer the question of whether the organism was able to undergo aerobic cellular respiration.arrow_forwardName three different sources of energy that could have powered reactions on early earth to form organic compounds.arrow_forward
- What was the most significant contribution of early photosynthetic organisms to Earth’s environment?arrow_forwardWhich of the following was likely MOST important for life to begin existing on Earth? A. sunlight B. DNA C. a source of oxygen D. a source of energyarrow_forwardDescribe how the sudden appearance of oxygen in the atmosphere about 2.5 billion years ago influenced the development of modern life-forms.arrow_forward
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