Multiple Choice
In the context of organic chemistry, what is one primary way organisms utilize organic carbon?
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Intro to Organic Chemistry
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Which method do scientists primarily use to identify a mass extinction event in the fossil record?
A
Analysis of carbon isotope ratios
B
Examination of sudden changes in species diversity
C
Study of sedimentary rock layers
D
Measurement of radioactive decay in fossils
Verified step by step guidance1
Understand the concept of a mass extinction event: A mass extinction event is characterized by a rapid and widespread decrease in the biodiversity on Earth, where a significant percentage of species become extinct in a relatively short period of geological time.
Identify the primary method used by scientists to detect mass extinction events: Scientists primarily look for sudden changes in species diversity within the fossil record. This involves examining the fossil layers for abrupt reductions in the number and variety of species.
Examine the fossil record: Scientists analyze sedimentary rock layers where fossils are preserved. They look for layers that show a significant drop in the number of species or the disappearance of certain species.
Consider the role of carbon isotope ratios: While changes in carbon isotope ratios can provide information about past environmental conditions, they are not the primary method for identifying mass extinction events. They can, however, support findings related to changes in biodiversity.
Evaluate the use of radioactive decay: Measurement of radioactive decay in fossils is primarily used for dating purposes, helping to establish the timeline of events, but it is not the main method for identifying mass extinction events.
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