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Questions and Answers
What can be inferred about the age of a fossil that contains 12% of the normal amount of carbon 14?
What can be inferred about the age of a fossil that contains 12% of the normal amount of carbon 14?
Which of the following is true about the evolutionary origin of groups of organisms?
Which of the following is true about the evolutionary origin of groups of organisms?
Why are fossils of soft-bodied organisms usually relatively rare?
Why are fossils of soft-bodied organisms usually relatively rare?
What does the structural similarity between the flippers of whales and arms of humans suggest?
What does the structural similarity between the flippers of whales and arms of humans suggest?
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Which molecules can provide information about the evolutionary relationships between two species?
Which molecules can provide information about the evolutionary relationships between two species?
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What is the term for a biologist who studies fossils to understand the origin and evolution of living things?
What is the term for a biologist who studies fossils to understand the origin and evolution of living things?
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What is the process by which the earliest photosynthetic organisms likely evolved?
What is the process by which the earliest photosynthetic organisms likely evolved?
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What is a key factor in the theory of evolution that leads to the formation of new species?
What is a key factor in the theory of evolution that leads to the formation of new species?
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What is the process that probably assisted the origin of autotrophs?
What is the process that probably assisted the origin of autotrophs?
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According to modern biology, which group of organisms is considered to be at a lower level of evolution?
According to modern biology, which group of organisms is considered to be at a lower level of evolution?
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What is the term for the process by which organisms produce their own food from inorganic compounds?
What is the term for the process by which organisms produce their own food from inorganic compounds?
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Which of the following events is thought to have occurred first in the evolution of life on Earth?
Which of the following events is thought to have occurred first in the evolution of life on Earth?
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Which organelle was a free-living cell before the evolution of eukaryotic cells?
Which organelle was a free-living cell before the evolution of eukaryotic cells?
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Which process is thought to have evolved last in the history of life on Earth?
Which process is thought to have evolved last in the history of life on Earth?
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What is the term for the study of the origin and gradual changes of living things?
What is the term for the study of the origin and gradual changes of living things?
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Which group of organisms is believed to be the first photosynthetic organisms to evolve on Earth?
Which group of organisms is believed to be the first photosynthetic organisms to evolve on Earth?
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Which of the following processes probably evolved before all other three?
Which of the following processes probably evolved before all other three?
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Which theory about the origin of life agrees with the concept of change in organisms and their genetic composition over generations being caused by meiosis, hybridization, natural selection, or mutation?
Which theory about the origin of life agrees with the concept of change in organisms and their genetic composition over generations being caused by meiosis, hybridization, natural selection, or mutation?
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What is the most accepted theory about the origin of life on earth?
What is the most accepted theory about the origin of life on earth?
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Why did Stanley Miller exclude free oxygen from the mixture of gases in his simulation experiment?
Why did Stanley Miller exclude free oxygen from the mixture of gases in his simulation experiment?
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What is the common idea held by all the creationists?
What is the common idea held by all the creationists?
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According to the theory of evolution proposed by Charles Darwin, what is the most important driving force of evolution?
According to the theory of evolution proposed by Charles Darwin, what is the most important driving force of evolution?
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Which of the following is not a process that contributes to the origin of autotrophs?
Which of the following is not a process that contributes to the origin of autotrophs?
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What is the primary function of photosynthesis in the origin of autotrophs?
What is the primary function of photosynthesis in the origin of autotrophs?
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Study Notes
The Origin of Life
- Among the four processes, photosynthesis probably evolved before the others.
- The biochemical origin theory agrees with the concept of change in organisms and their genetic composition over generations being caused by meiosis, hybridization, natural selection, or mutation.
- The most accepted theory about the origin of life on earth is the theory of chemical evolution.
Stanley Miller's Experiment
- Stanley Miller excluded free oxygen from the mixture of gases used for his simulation experiment because the primitive atmosphere was reducing.
Creationism
- The common idea held by all creationists is that life was created by a supernatural being.
Evolution
- According to Charles Darwin's theory of evolution, natural selection is the most important driving force of evolution.
- The branch of biology that studies the origin and gradual changes of living things is evolution.
Characteristics of Organisms
- Protists are found at a lower level of evolution according to the modern principles of biology.
- Green algae and blue-green algae are believed to be the first photosynthetic organisms to evolve on earth.
Evolutionary History
- The origin of the oldest eukaryotic organisms came before the availability of free oxygen in the atmosphere.
- The origin of the first multicellular animals and plants came after the origin of the oldest eukaryotic organisms.
- The earliest Homo sapiens appeared after the flowering plants.
Fossils
- Fossils of soft-bodied organisms are relatively rare because their bodies decompose readily.
- The age of a fossil can be determined by the amount of carbon 14 present.
Comparative Anatomy
- The structural similarity between the flippers of whales and arms of humans shows that whales and humans had a common ancestry.
Molecular Biology
- The similarity between DNA and proteins of different species can give information about how much the species are evolutionarily related to one another.
Paleontology
- A paleontologist is a specialist who studies fossils to generate new knowledge on the origin and evolution of living things of past geologic periods.
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