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Charles Darwin puzzled over differences in the _____ of the different species of Galapagos finches.
differences in genes create variation
genetic variation within a population
scientific discoveries about DNA and genetic changes
natural selection
beaks
Shrubs growing longer thorns over many generations
differences in genes
starvation, disease, competition, and predation.
Which of the following factors is necessary for natural selection to occur in a species?
differences in genes create variation
genetic variation within a population
scientific discoveries about DNA and genetic changes
natural selection
beaks
Shrubs growing longer thorns over many generations
differences in genes
starvation, disease, competition, and predation.
Darwin observed variations among individuals within a population, but he did not realize that these variations were caused by
differences in genes create variation
genetic variation within a population
scientific discoveries about DNA and genetic changes
natural selection
beaks
Shrubs growing longer thorns over many generations
differences in genes
starvation, disease, competition, and predation.
What is the process by which organisms that are better adapted to their environment survive and reproduce more successfully than less well adapted organisms do?
differences in genes create variation
genetic variation within a population
scientific discoveries about DNA and genetic changes
natural selection
beaks
Shrubs growing longer thorns over many generations
differences in genes
starvation, disease, competition, and predation.
Which of the following is an example of natural selection?
differences in genes create variation
genetic variation within a population
scientific discoveries about DNA and genetic changes
natural selection
beaks
Shrubs growing longer thorns over many generations
differences in genes
starvation, disease, competition, and predation.
Populations of all species are limited by
differences in genes create variation
genetic variation within a population
scientific discoveries about DNA and genetic changes
natural selection
beaks
Shrubs growing longer thorns over many generations
differences in genes
starvation, disease, competition, and predation.
What evidence of natural selection is available today that was not available to Darwin?
differences in genes create variation
genetic variation within a population
scientific discoveries about DNA and genetic changes
natural selection
beaks
Shrubs growing longer thorns over many generations
differences in genes
starvation, disease, competition, and predation.
Which was NOT a source of Charles Darwin’s ideas about evolution?
differences in genes create variation
genetic variation within a population
scientific discoveries about DNA and genetic changes
natural selection
beaks
Shrubs growing longer thorns over many generations
differences in genes
starvation, disease, competition, and predation.
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