Biology 18 Evolution & the Origin of Species MCQ

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Photo depicts Earth from space.
This NASA image is a composite of several satellite-based views of Earth. To make the whole-Earth image, NASA scientists combine observations of different parts of the planet. (credit: NASA/GSFC/NOAA/USGS)

Viewed from space, Earth offers no clues about the diversity of life forms that reside there. The first forms of life on Earth are thought to have been microorganisms that existed for billions of years in the ocean before plants and animals appeared. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Humans have inhabited this planet for only the last 2.5 million years, and only in the last 200,000 years have humans started looking like we do today.

Unit 4. Evolutionary Processes

Chapter 18: Evolution and the Origin of Species MCQ Multiple Choices Questions Quiz Test Bank

18.1 Understanding Evolution

18.2 Formation of New Species

18.3 Reconnection and Rates of Speciation

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Biology 18 Evolution & the Origin of Species
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13 Pages
2015
English US
Educational Materials



Source:  OpenStax College. Download for free at http://cnx.org/content/col16448/latest/
Rachel Carlisle
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