Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:The graphs below represent changes in atmospheric carbon dioxide concentration and Antarctic temperature over the past 800,000 years. Which of the following statements accurately explains the trends in the concentration of atmospheric carbon dioxide from 200,000 years to the present?
**Graph Description:**
- The x-axis represents "Years Before Present," ranging from 800,000 to 0.
- The left y-axis measures "Temperature (°C)" ranging from -12 to 4, shown in red.
- The right y-axis measures "CO₂ Concentration (ppm)" ranging from 150 to 400, shown in blue.
The graph includes two curves:
- A red line indicating temperature fluctuations.
- A blue line showing CO₂ concentration changes.
The data displays cyclical fluctuations in both temperature and CO₂ levels over time, with a significant increase in CO₂ concentrations in recent years.
**Answer Options:**
1. Atmospheric carbon dioxide concentrations have remained constant between 200,000 years ago until 50,000 years ago, after which they declined steadily.
2. Atmospheric carbon dioxide concentrations increased exponentially until reaching a carrying capacity of 400ppm.
3. Atmospheric carbon dioxide concentrations have risen and fallen between 150ppm and 250ppm until rising exponentially in recent years.
4. Atmospheric carbon dioxide concentrations have risen and fallen between 175ppm and 330ppm.
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