Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 21.2, Problem 2C
Summary Introduction
To explain: The way in which the presence of molecular oxygen in the atmosphere affects early life.
Concept introduction: Photosynthesis is a vital process in primary producers such as cyanobacteria and plants. Plants use the light energy and carbon dioxide from the atmosphere and produce sugars (which are stored in various parts of the plants) and release oxygen.
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Chapter 21 Solutions
Biology (MindTap Course List)
Ch. 21.1 - Describe the conditions that scientists think...Ch. 21.1 - Compare the prebiotic soup hypothesis with the...Ch. 21.1 - Prob. 1CCh. 21.1 - How does the ironsulfur world hypothesis differ...Ch. 21.2 - Outline the major steps hypothesized to have...Ch. 21.2 - Explain how the evolution of photosynthetic...Ch. 21.2 - Prob. 5LOCh. 21.2 - Prob. 1CCh. 21.2 - Prob. 2CCh. 21.2 - VISUALIZE Draw a simple sketch illustrating the...
Ch. 21.3 - Briefly describe the distinguishing organisms and...Ch. 21.3 - What is the correct order of appearance in the...Ch. 21.3 - Prob. 2CCh. 21.3 - What is the correct order of appearance in the...Ch. 21 - Energy, the absence of molecular oxygen, chemical...Ch. 21 - Prob. 2TYUCh. 21 - Prob. 3TYUCh. 21 - According to the hypothesis of serial...Ch. 21 - Prob. 5TYUCh. 21 - Prob. 6TYUCh. 21 - Prob. 7TYUCh. 21 - The time of greatest evolutionary diversification...Ch. 21 - Prob. 9TYUCh. 21 - The Age of Reptiles corresponds to the (a)...Ch. 21 - Evidence exists that a catastrophic collision...Ch. 21 - Flowering plants and mammals diversified and...Ch. 21 - Prob. 13TYUCh. 21 - EVOLUTION LINK If you were studying how...Ch. 21 - EVOLUTION LINK If living cells were produced in a...Ch. 21 - EVOLUTION LINK Why did the evolution of...Ch. 21 - INTERPRET DATA Evidence for the oldest...
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- What was the most significant contribution of early photosynthetic organisms to Earth’s environment?arrow_forwardDescribe what the early atmosphere was like and what cause a large amount of oxygen (O2) to build up in the atmosphere?arrow_forwardBefore the emergence of life of what gases was the earth's primitive atmosphere constituted?arrow_forward
- How the evolution of oxygen was involved in the initial evolution of terrestrial life?arrow_forwardIn what order did events occur that led to life on Earth? (1) appearance of aerobic organisms, (2) appearance of photosynthetic organisms, (3) appearance and increase of O2 in the atmosphere, (4) self-replicating RNA developsa. 4, 2, 3, 1b. 2, 3, 1, 4c. 3, 1, 4, 2d. 1, 2, 4, 3arrow_forwardWhat Were the Earliest Organisms Like?arrow_forward
- What factors influenced the isotopic composition of oxygen in skeletons of marine organisms during the modern ice age?arrow_forward7. Which of the following statements about early life on earth is incorrect? A) Earth was anoxic B) Carbon was obtained from CO2 C) Energy was obtained from glucose D) D) Cells were likely chemolitbotrophicarrow_forwardWhy would a rise in the availability of oxygen help explain why the Cambrian explosion occurred?arrow_forward
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From Sea to Changing Sea | Early Life in the Oceans || Radcliffe Institute; Author: Harvard University;https://www.youtube.com/watch?v=Ac0TmDf5Feo;License: Standard youtube license