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Biol 322 Exam 4 (ch. 11-15, 18, 19, 20) 2025 Questions and Answers Among the oldest fossils on Earth are the microfossils from the Agnes gold mines of South Africa, which are ______ years old - ....ANSWER ...-3.2 billion In order to understand the origin of life on Earth, evolutionary biologists collaborate with: - ....ANSWER ...-All of the above (chemists, geologists, atmosphere scientists) Which of the following statements about LUCA is NOT correct? - ....ANSWER ...- It is meant to be a single organism Which two scientists elaborated on Darwin's idea of the "warm little pond" and formulated the "prebiotic soup hypothesis" as the first hypothesis for the abiotic origin of life on earth? - ....ANSWER ...-Oparin and Haldane Which gas was most likely the least abundant in early Earth's atmosphere? ....ANSWER ...-oxygen Miller and Urey developed and conducted some experimental tests for a "prebiotic soup" model of the origin of life, which had been proposed a few decades earlier by Oparin and Haldane. What did Miller and Urey show could be synthesized abiotically? ....ANSWER ...-amino acids …FOR STUDENTS ONLY…©️2025 ALL RIGHTS RESERVED… 1