Macroevolution

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What is Macroevolution?

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Macroevolution refers to large-scale evolutionary changes that occur over long periods of time, leading to the emergence of new species and groups of organisms.

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What is Prezygotic Isolation?

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Prezygotic Isolation is a reproductive barrier that prevents mating or fertilization between species before the zygote is formed.

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Give an example of Prezygotic Isolation.

Back

Eastern and Western Meadowlark are an example of Prezygotic Isolation due to differences in their mating calls.

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What is Co-evolution?

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Co-evolution is the process where two or more species influence each other's evolution, often seen in mutualistic relationships.

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True or False: Co-evolution happens when species in symbiosis evolve simultaneously.

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True

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What is Directional Selection?

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Directional Selection is a mode of natural selection where one extreme phenotype is favored over others, leading to a shift in the population's traits.

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Give an example of Directional Selection.

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Peppered Moths in England during the Early Industrial Revolution is an example of Directional Selection.

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What is Adaptive Radiation?

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Adaptive Radiation is the process where one ancestral species evolves into multiple species to fill various ecological niches.

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What is Postzygotic Isolation?

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Postzygotic Isolation is a reproductive barrier that occurs after fertilization, preventing the hybrid offspring from developing into a viable adult.

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True or False: Postzygotic Isolation prevents reproduction by making fertilization unlikely.

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False; it occurs after fertilization.