BIOLOGY CONNECT ACCESS CARD
12th Edition
ISBN: 9781264037452
Author: Raven
Publisher: MCG
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Chapter 25, Problem 3A
Which bits of evidence would convince you that life originated as early as 3.2 BYA?
a. You look at a microfossil under a scanning electron microscope and it is the same shape as a cell.
b. A high-quality transmission electron micrograph of a fossil cell reveals cellular compartments, including a possible nucleus.
c. Potassium dating of a fossil containing a possible cell indicates that the fossil is 3.2 billion years old.
d. Using transmission and scanning electron microscopy, you find evidence of a carbon-based material in what appears to be a cell wall of a fossil isotopically dated as 3.2 billion years old.
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Chapter 25 Solutions
BIOLOGY CONNECT ACCESS CARD
Ch. 25.1 - Describe the history of the Earth.Ch. 25.1 - Understand the relationship between geological...Ch. 25.2 - Contrast todays atmosphere with the likely...Ch. 25.2 - Prob. 2LOCh. 25.3 - Prob. 1LOCh. 25.4 - Prob. 1LOCh. 25.4 - Prob. 2LOCh. 25.5 - Compare and contrast the evolution of the...Ch. 25.5 - Discuss the types of cell specialization necessary...Ch. 25 - The Miller-Urey experiment demonstrated that a....
Ch. 25 - Plate tectonics can contribute to a. volcanoes and...Ch. 25 - Identify which of the following statements is...Ch. 25 - Which of the following events occurred first in...Ch. 25 - Fossil data indicate that a. life originated 4...Ch. 25 - A global glaciation would be unlikely to occur if...Ch. 25 - Although we do not know how early life arose, the...Ch. 25 - Which bits of evidence would convince you that...Ch. 25 - During which tunes would you expect that...Ch. 25 - The chloroplasts of brown algae a. have a...Ch. 25 - Vascular plants sequestered large amounts of CO2...Ch. 25 - Synthesizing what you have learned in this...Ch. 25 - Prob. 3S
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