BIOLOGY
12th Edition
ISBN: 9781264839698
Author: Raven
Publisher: MCG CUSTOM
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Textbook Question
Chapter 25.2, Problem 1LO
Contrast today’s atmosphere with the likely atmosphere at the end of the Hadean eon.
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Compare the changes in Earth's past and present atmosphere
Earth's early atmosphere
Earth's atmosphere today
Traces of
nitrogen,
ammonia,
methane
Traces of
carbon dioxide,
water vapour,
ammonia,
methane
4%
water vapour
21%
oxygen
95%
78%
carbon dioxide
nitrogen
Average surface
temperature above 400°C
Average surface
temperature 20 °C
List several significant events in the history of life on earth that are associated with the K-T Boundary.
In Stanley Miller’s experiment to recreate the early Earth conditions that gave rise to life, describe which part of the experimental instruments mimicked
the ocean,
the atmosphere,
rain, and
lightning.
Chapter 25 Solutions
BIOLOGY
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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- An abundance of___________ in Earths early atmosphere would have prevented the spontaneous assembly of organic compounds on early Earth. a. hydrogen b. methane c. oxygen d. nitrogenarrow_forwardIf the half-life of a radioisotope is 20,000 years, then a sample in which three-quarters of that radioisotope has decayed is _______ years old. a. 15,000 b. 26,667 c. 30,000 d. 40,000arrow_forwardDo you think that the average annual global temperature and carbon dioxide levels have been consistent throughout the history of earth?arrow_forward
- Why is it hard to create a timeline of events chronicling Earth’s History?arrow_forwardDescribe how the sudden appearance of oxygen in the atmosphere about 2.5 billion years ago influenced the development of modern life-forms.arrow_forwardGive two lines of evidence supporting the asteroid impact hypothesis for the Cretaceous extinctions.arrow_forward
- The Miller-Urey experiment simulated compounds present in the atmosphere of early Earth, lightning, and the evaporation and condensation of atmospheric water. What other information about the conditions on Earth during this time period would you want to know to improve the experimentarrow_forwardExplain why the Oxygen (3800-3500 million years ago) is important and elucidate the impact of that event in todays’ living organisms.arrow_forwardAnalyze the following data table indicating the amount of Carbon Dioxide in Earth's atmosphere at certain periods of Earth's history. Millions of Years Ago 500 300 200 100 Carbon Dioxide Level (in parts per million) 6000 500 2000 1750 Identify which of the time periods would have been the warmest and describe how the concentration of greenhouse gases like carbon dioxide influence the temperature of Earth's atmosphere.arrow_forward
- Life originated from the earth’s inorganic atmosphere in the post, but this no longer happens today. Give two reasons?arrow_forward1) why is nitrogen very much abundant in the atmosphere as compared to oxygen which support plant and animal life? 2) Explain what causes the mantle to flow?arrow_forwardWhich of the following accurately describes the Hadeon Eon? Earth during the Hadeon Eon closely resembled the earth of today. Earth was extremely hot and molten in nature during the Hadeon Eon. Earth contains an oxygen-rich atmosphere that allows photosynthetic organisms to flourish. Life first appeared on Earth during the Hadeon Eon.arrow_forward
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