Which of the following pieces of evidence prompted researchers to abandon the hypothesis that a supernova caused the high levels of iridium in the K-T layer? Select one response. a. Coarse sediment mixed with uniform Cretaceous mud in Texas || b. Differences in foraminifera fossils above and below the K-T boundary layer c. High levels of iridium in the K-T boundary layer d. Lack of an isotope of plutonium in the K-T boundary layer
Which of the following pieces of evidence prompted researchers to abandon the hypothesis that a supernova caused the high levels of iridium in the K-T layer? Select one response. a. Coarse sediment mixed with uniform Cretaceous mud in Texas || b. Differences in foraminifera fossils above and below the K-T boundary layer c. High levels of iridium in the K-T boundary layer d. Lack of an isotope of plutonium in the K-T boundary layer
Biology: The Unity and Diversity of Life (MindTap Course List)
14th Edition
ISBN:9781305073951
Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr
Chapter16: Evidence Of Evolution
Section: Chapter Questions
Problem 6SQ: Which of the following is a fossil? a. an insect encased in 10-millon-year-old tree sap b. a woolly...
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