#Question id: 4708
#Unit 11. Evolution and Behavior
The following questions refer to the figure below, which shows an outcrop of sedimentary rock whose strata are labeled A-D. If x indicates the fossils of two closely related species, neither of which is extinct, then their remains may be found in how many of these strata?
#Question id: 8905
#Unit 9. Diversity of Life Forms
#Question id: 22016
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 18920
#Unit 13. Methods in Biology
#Question id: 4818
#Unit 3. Fundamental Processes
Researchers found a strain of E. coli bacteria that had mutation rates one hundred times higher than normal. Which of the following statements correctly describes the most likely cause of these results?