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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- How the evolution of oxygen was involved in the initial evolution of terrestrial life?arrow_forwardWhat Were the Earliest Organisms Like?arrow_forwardDirect evidence of life on early Earth comes from fossils of microorganisms that lived 3.5 billion years ago. But how did the first living cells appear?arrow_forward
- What factors influenced the isotopic composition of oxygen in skeletons of marine organisms during the modern ice age?arrow_forwardWhy would a rise in the availability of oxygen help explain why the Cambrian explosion occurred?arrow_forwardWhat is the correct order of appearance in the fossil record, starting with the earliest: eukaryotic cells, multicellular organisms, prokaryotic cells?arrow_forward
- There was a large proliferation of fossils showing increase in diversity of life.What period is this?arrow_forwardState in what ways Stanley miller simulated the condition of :-i) Primitive atmosphere on earth.ii) Energy source at the time of origin of life .iii) Formation of organic molecule of life.arrow_forwardOnce life began, what types of organisms lived on Earth forthe next two billion years? Where did these organisms live?arrow_forward
- List three locations where the building blocks of Earth’s first lifemay have formedarrow_forwardDescribe how scientists have tested the hypothesis that simpleorganic molecules could have formed on the early Eartharrow_forwardHow would the appearance of protocells have represented a key step in the origin of life?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