EARLY EARTH HISTORY – Flashcards
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Cyanobacteria increased the levels of carbon dioxide in the atmosphere.
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F
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Geologic events that occurred during the Paleozoic Era include mountain building and volcanic activity.
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T
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The development of ____ factored in the development of complex organisms.
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d. all of the above
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A life-form in the Precambrian time was ____.
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a. cyanobacteria
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What time period lasted for more than half of the hypothesized history of the Earth?
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d. Precambrian
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Animal life in the Paleozoic Era included all of the following EXCEPT ____.
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b. humans
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Little is known about much of Earth's early history because ____.
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d. all of the above
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Life-forms that existed during the Paleozoic Era included ____.
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d. all of the above
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Early land animals had gills as well as lungs.
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T
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The Precambrian time period is the largest on the geological time scale.
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T
