Trilobite fOS the P-T extinction. They are not fou 12. Explain one inference you can make about fossils from the information in the rock layer images.
Trilobite fOS the P-T extinction. They are not fou 12. Explain one inference you can make about fossils from the information in the rock layer images.
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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Please answer number 12 ASAP
Transcribed Image Text:They were a genus of small, meat-eating dino
Coelophysis fossils appear after the P-T extincti
The fossil record shows changes in species
Ord
mil
history when the rate of species loss was very high.
Identifying Extinction Events in the Fossil Record
extinction happened about 248 million years ago.
Trilobite fossils are found in the fossil recori
the P-T extinction. They are not found aftenwe
12. Explain one inference you can make about fossils from the information in the rock
layer images.
Extinction
An extinction occurs when a species dies out and there are no members of the
species left on Earth. The fossil record shows an extinction when a species is no longer
found in sedimentary rock layers. For example, trilobites were once very common
marine arthropods. They disappeared from the fossil record after the Permian-Triassic
extinction, which indicates that trilobites became extinct.
A mass extinction happens when whole groups of related species die out at
about the same time. Mass extinctions appear to be caused by large changes to the
environment. When so many organisms die, there are many new opportunities for
surviving species to use ecosystem resources. They then thrive and change over time.
The numbers of new species found in the fossil record after each mass extinction
eventually increases over time.
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