Biology: The Unity and Diversity of Life (Looseleaf)
Biology: The Unity and Diversity of Life (Looseleaf)
15th Edition
ISBN: 9781337408417
Author: STARR
Publisher: CENGAGE L
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Chapter 19, Problem 14SQ

Which of the following events did NOT occur during the Precambrian?

  1. a. Formation of the ozone layer
  2. b. RNA world
  3. c. Evolution of the first animals
  4. d. Evolution of the first plants.
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Which of the following events did NOT occur during thePrecambrian?a. Formation of the ozone layerb. RNA worldc. Evolution of the first animalsd. Evolution of the first plants
The first forms of life on Earth were a. plants b. microorganisms c. birds d. dinosaurs
Which of these steps probably occurred first in the chemical andbiological evolution of life?a. The cell membrane of a protobiont formed.b. The first organic molecules formed.c. The original genetic material was RNA.d. Simple organic monomers formed from inorganic materials.
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