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If a radioactive substance that weighs one kilogram has a half-life of 100 years, what percentage of the substance would be left after 300 years?
If a radioactive substance that weighs one kilogram has a half-life of 100 years, what percentage of the substance would be left after 300 years?
If a fossil is 17 years old, about what percent of the original carbon-14 present in the fossil would still be detectable?
If a fossil is 17 years old, about what percent of the original carbon-14 present in the fossil would still be detectable?
According to Lamarck's theory of evolution, what is the mechanism by which evolving organisms acquire new structures?
According to Lamarck's theory of evolution, what is the mechanism by which evolving organisms acquire new structures?
Which line of thinking supports the statement that 'Rats can be produced by keeping rags and grains at the corner of a room'?
Which line of thinking supports the statement that 'Rats can be produced by keeping rags and grains at the corner of a room'?
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What is the specific name of biological scientists who do research that tries to find evidence of life on other planets in the solar system?
What is the specific name of biological scientists who do research that tries to find evidence of life on other planets in the solar system?
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If a substance that weighs 2000 grams and has a half-life of 100 years is left with only 250 grams, for how long has the radioactive decaying activity been undergoing?
If a substance that weighs 2000 grams and has a half-life of 100 years is left with only 250 grams, for how long has the radioactive decaying activity been undergoing?
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Why did Louis Pasteur use a swan-necked flask instead of a straight-necked one in his experiment to disprove the theory of spontaneous generation?
Why did Louis Pasteur use a swan-necked flask instead of a straight-necked one in his experiment to disprove the theory of spontaneous generation?
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Which of the following pairs of molecules can provide the most information about the evolutionary relationship between two species?
Which of the following pairs of molecules can provide the most information about the evolutionary relationship between two species?
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If two species are known to belong to the same order, they must also belong to which taxonomic category?
If two species are known to belong to the same order, they must also belong to which taxonomic category?
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What type of natural selection is occurring when individuals at both extreme ends of a range have better survival advantages than those around the middle?
What type of natural selection is occurring when individuals at both extreme ends of a range have better survival advantages than those around the middle?
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During which geologic period does the fossil record show the most diverse and relatively higher forms of organisms?
During which geologic period does the fossil record show the most diverse and relatively higher forms of organisms?
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What is an evolutionary requirement for two subpopulations of a species to evolve into independent species?
What is an evolutionary requirement for two subpopulations of a species to evolve into independent species?
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To which genus does the famous fossil 'Lucy' belong?
To which genus does the famous fossil 'Lucy' belong?
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Which of the following is NOT a reason why fossils of soft-bodied organisms are relatively rare?
Which of the following is NOT a reason why fossils of soft-bodied organisms are relatively rare?
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Which of the following ideas was part of Jean-Baptiste Lamarck's theory of evolution?
Which of the following ideas was part of Jean-Baptiste Lamarck's theory of evolution?
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If a fossil contains only 12% of the typical amount of carbon-14 found in living organisms, and carbon-14 has a half-life of 5730 years, how old is the fossil?
If a fossil contains only 12% of the typical amount of carbon-14 found in living organisms, and carbon-14 has a half-life of 5730 years, how old is the fossil?
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Which of the following processes is most important for speciation to occur?
Which of the following processes is most important for speciation to occur?
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Which of the following fossils is considered the closest known relative to the common ancestor of humans and apes?
Which of the following fossils is considered the closest known relative to the common ancestor of humans and apes?
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