Podcast
Questions and Answers
What evolutionary process is exemplified when a population is separated by a newly formed mountain range?
What evolutionary process is exemplified when a population is separated by a newly formed mountain range?
- Temporal isolation
- Behavioral isolation
- Geographic isolation (correct)
- Genetic equilibrium
When individuals displaying an average trait value have the highest fitness, what type of selection is at play?
When individuals displaying an average trait value have the highest fitness, what type of selection is at play?
- Disruptive selection
- Directional selection
- Unpredictable selection
- Stabilizing selection (correct)
Which of the following does NOT describe how natural selection commonly shapes the distribution of phenotypes within a population?
Which of the following does NOT describe how natural selection commonly shapes the distribution of phenotypes within a population?
- Disruptive selection favors both extremes, potentially leading to two distinct groups.
- Chance events consistently guide phenotypes towards predetermined perfection. (correct)
- Stabilizing selection favors the average trait, reducing variation.
- Directional selection shifts the population towards one extreme.
what situation might develop in a population having some plants whose flowers open at midday and other plants whose flowers open late in the day.
what situation might develop in a population having some plants whose flowers open at midday and other plants whose flowers open late in the day.
In a scenario where lions selectively prey on a herd of antelope, with some antelopes being killed and others escaping, what key aspect of Darwin's natural selection is best illustrated?
In a scenario where lions selectively prey on a herd of antelope, with some antelopes being killed and others escaping, what key aspect of Darwin's natural selection is best illustrated?
What factor is crucial for the formation of a new species, by preventing gene flow between populations?
What factor is crucial for the formation of a new species, by preventing gene flow between populations?
In a population of flowers with white and bright pink varieties, bees preferentially pollinate the bright pink flowers due to their easier visibility. Over time, what is the most likely outcome for future generations of these flowers?
In a population of flowers with white and bright pink varieties, bees preferentially pollinate the bright pink flowers due to their easier visibility. Over time, what is the most likely outcome for future generations of these flowers?
In the context of population genetics, what process causes allele frequencies to shift randomly, particularly in smaller populations?
In the context of population genetics, what process causes allele frequencies to shift randomly, particularly in smaller populations?
What term did Darwin use to describe an organism's capacity to thrive and reproduce in its surrounding environment?
What term did Darwin use to describe an organism's capacity to thrive and reproduce in its surrounding environment?
Which concept is NOT integrated into the modern synthesis of evolutionary theory?
Which concept is NOT integrated into the modern synthesis of evolutionary theory?
Flashcards
Geographic Isolation
Geographic Isolation
Separation of populations by barriers, such as rivers or mountains.
Stabilizing Selection
Stabilizing Selection
Individuals with an average trait have the highest fitness.
Phenotype Distribution
Phenotype Distribution
Natural selection acts on existing phenotypic variation.
Temporal isolation
Temporal isolation
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Natural Selection
Natural Selection
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Speciation Factor
Speciation Factor
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Flower Color Prediction
Flower Color Prediction
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Genetic Drift
Genetic Drift
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Evolution
Evolution
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Modern Evolution
Modern Evolution
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Study Notes
- The separation of populations by barriers such as rivers, mountains, or bodies of water is called geographic isolation.
- When individuals with an average form of a trait have the highest fitness, the result is stabilizing selection.
- Chance events is NOT a way in which natural selection affects the distribution of phenotypes.
- A situation that might develop in a population is having some plants whose flowers open at midday and other plants whose flowers open late in the day.
- When lions prey on a herd of antelope, some antelope are killed and some escape, survival of the fittest concept of natural selection might be used to describe this situation.
- A factor that is necessary for the formation of a new species is reproductive isolation.
- A certain species of flower has two varieties; one type is white, and the other is bright pink due to slight genetic differences; there will be more of the pink flowers and less of the white flowers.
- In genetic drift, allele frequencies change because of chance.
- Darwin called the ability of an organism to survive and reproduce in its environment adaptation.
- Transmission of acquired characteristics is NOT included in the modern theory of evolution.
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