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Questions and Answers
Which of the following best describes the evolution of complex structures?
Which of the following best describes the evolution of complex structures?
- They evolved from simpler versions that performed different functions.
- They evolved in increments from simpler versions that performed the same basic function. (correct)
- They evolved from unrelated structures through convergent evolution.
- They evolved suddenly without any intermediate forms.
What are the simplest eyes composed of?
What are the simplest eyes composed of?
- Patches of light-sensitive photoreceptor cells (correct)
- Light-sensitive pigments
- Photoreceptor cells and lenses
- Complex structures with multiple layers
What must be considered when identifying evolutionary trends?
What must be considered when identifying evolutionary trends?
- Only extant species
- Only extinct species
- All fossils, including those from extinct lineages (correct)
- Only fossils from the most recent time period
Which example shows a trend toward large, single-toed species?
Which example shows a trend toward large, single-toed species?
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According to the species selection model, what determines evolutionary trends?
According to the species selection model, what determines evolutionary trends?
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Do evolutionary trends imply an intrinsic drive toward a particular phenotype?
Do evolutionary trends imply an intrinsic drive toward a particular phenotype?
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What is the result of evolution?
What is the result of evolution?
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What is the main focus of evolutionary trends?
What is the main focus of evolutionary trends?
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What is the relationship between complex structures and simpler versions?
What is the relationship between complex structures and simpler versions?
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What determines the success of speciation in the species selection model?
What determines the success of speciation in the species selection model?
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