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"In microbiology the roles of mutation and selection in evolution are coming to be better understood through the use of bacterial cultures of mutant strains."
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"The time scale for evolutionary or genetic change is very long. A characteristic period for the emergence of one advanced species from another is perhaps a hundred thousand years; and very often the difference in behavior between closely relatedspecies-say, lions and tigers-do not seem very great... But today we do not have ten million years to wait for the next advance. We live in a time when our world is changing at an unprecedented rate. While the changes are largely of our own making, they cannot be ignored. We must adjust and adapt andcontrol, or we perish."
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"All of nature was a record of crisis and destruction and adaptation and flourishing and being knocked back down again. What had happened on New Terra was singular and concrete, but the pattern it was part of seemed to apply everywhere and maybe always."
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"In the animal world, on the other hand, the process of evolution is characterised by the progressive discrimination of the animal and vegetative functions, and a consequent differentiation of these two great provinces into their separate departments."
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"Theories of evolution must provide for the creative acts which brought such theories into existence."
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"Since the dawn of time, women have been attracted to mates with strong survival skills-like intelligence and physical prowess-because men with these qualities are more likely to bring home dinner at the end of the day. He stuck his thumbs in the air and grinned. 'Dinner equals survival, team."
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"The very large brain that humans have, plus the things that go along with it - language, art, science - seemed to have evolved only once. The eye, by contrast, independently evolved 40 times. So, if you were to 'replay' evolution, the eye would almost certainly appear again, whereas the big brain probably wouldn't."
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"Evolution has no long-term goal. There is no long-distance target, no final perfection to serve as a criterion for selection, although human vanity cherishes the absurd notion that our species is the final goal of evolution."
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"Oxygen flooded into the atmosphere as a pollutant, even a poison, until natural selection shaped living things to thrive on the stuff and, indeed, suffocate without it."
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"We are the facilitators of our own creative evolution."
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"That's the way I try to live. I think it's the only way for human beings at this point in our evolution as souls, where everyone in their lifetime is going through stuff."
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"That the primary effect of gene mutation may be as simple as the substitution of a single amino acid by another and may lead to profound secondary changes in protein structure and properties has recently been strongly indicated by the work of Ingram on hemoglobin."
Work
"As has repeatedly been stated, the underlying hypothesis, which in a number of cases has been supported by direct experimental evidence, is that each gene controls the production, function, and specificity of a particular enzyme."
Production
"In microbiology the roles of mutation and selection in evolution are coming to be better understood through the use of bacterial cultures of mutant strains."
Evolution
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