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He discovered and named the atomic nucleus, the proton, the alpha particle, and the beta particle.He discovered the concept of nuclear half-lives and achieved the first deliberate transformation of one element into another, fulfilling one of the ancient passions of the alchemists.A) Only early Earth was intensely bombarded by large space debris. C) Less ultraviolet radiation penetrated early Earth's atmosphere.

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Then, even if circumstances change such that it no longer provides any survival or reproductive advantage, the behavior will still tend to be exhibited -- unless it becomes positively disadvantageous in the new environment.adaptation: Any heritable characteristic of an organism that improves its ability to survive and reproduce in its environment.Also used to describe the process of genetic change within a population, as influenced by natural selection.A) They had the same proportion of L and D isomers as Earth does today. formation of DNA-based genetic systems A) I, II, III, IV B) I, III, II, IV C) II, III, I, IV D) II, III, IV, I5) Which of the following is a defining characteristic that all protobionts had in common?B) Their abundance would have been dramatically reduced upon passage through early Earth's oxidizing atmosphere. A) the ability to synthesize enzymes B) a surrounding membrane or membrane-like structure C) RNA genes D) the ability to replicate RNA6) The first genes on Earth were probably A) DNA produced by reverse transcriptase from abiotically produced RNA.Don’t be a thief—save your grade, use Bib Me™ and give credit to those who deserve it!

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