Ch. 25 - The History of Life on Earth
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Problem 4
Large-scale, worldwide adaptive radiations have occurred in which of the following situations? (A)when there are no available ecological niches (B)after each of the big five mass extinctions (C)after colonization of an isolated island that contains suit-able habitat and few competitor species (D)whenever an evolutionary innovation was needed for or-ganisms to thriveProblem 5
Scientists studying the origin of life have accomplished which of the following steps? (A)abiotic synthesis of protocells with self-replicating, catalytic RNA (B)formation of vesicles that use RNA as a template for DNA synthesis (C)formation of protocells that use DNA to direct the polymer-ization of amino acids (D)abiotic synthesis of RNA's bases (A, C, G, U)
