Which of the following statements is consistent with the information provided in the graph? Choose 1 answer: The extinction rate between the end-Permian and the end-Triassic extinctions indicates this was a time of global ecological stress. The tetrapod families that were lost during the end-Permian extinction returned after a lag of a few million years as they re-populated previously occupied habitats. Since the end-Permian extinction, the number of tetrapod families on Earth has halved roughly every 100 million years. Tetrapods underwent an adaptive radiation after the end-Cretaceous extinction, likely due to the use of ecological niches made available by the extinction event.
Which of the following statements is consistent with the information provided in the graph? Choose 1 answer: The extinction rate between the end-Permian and the end-Triassic extinctions indicates this was a time of global ecological stress. The tetrapod families that were lost during the end-Permian extinction returned after a lag of a few million years as they re-populated previously occupied habitats. Since the end-Permian extinction, the number of tetrapod families on Earth has halved roughly every 100 million years. Tetrapods underwent an adaptive radiation after the end-Cretaceous extinction, likely due to the use of ecological niches made available by the extinction event.
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 following graph shows the number of tetrapod (four-limbed animal) families on Earth over time, as
indicated by the fossil record. The arrows indicate major mass extinction events.
350
end-Cretaceous
300
extinction
end-Triassic
250+
extinction
200-
end-Permian
150+
extinction
100+
50-
300
250
200
150
100
50
Million years ago
Number of tetrapod families
Transcribed Image Text:Which of the following statements is consistent with the information provided in the graph?
Choose 1 answer:
The extinction rate between the end-Permian and the end-Triassic extinctions indicates this
was a time of global ecological stress.
The tetrapod families that were lost during the end-Permian extinction returned after a lag of a
few million years as they re-populated previously occupied habitats.
Since the end-Permian extinction, the number of tetrapod families on Earth has halved roughly
every 100 million years.
Tetrapods underwent an adaptive radiation after the end-Cretaceous extinction, likely due to
the use of ecological niches made available by the extinction event.
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