Macroevolution

Which answer best describes macroevolution?

• Largest-scale evolutionary changes that occur over time
• A scientist who classifies organisms into groups and makes a hypothesis on whether they are a different species based on the evidence
• Identification of species by differences in their appearances
• AP biological trait evolves in two unrelated species as a result of exposure to similar environments

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What is Speciation?

• A barrier that prevents species from mating because they breed at different times
• When two organisms live in the same area but rarely encounter each other
• The formation of a new distinct species in the course of evolution
• Barriers that prevent species from producing a fertile offspring or producing an offspring at all

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What explains Reproductive isolation?

• A biological trait evolves in two unrelated species as a result of exposure to similar environments
• Barriers that prevent species from producing a fertile offspring or producing an offspring at all.
• Barriers that prevent the formation of a fertile offspring
• The mating between two species

What best defines Temporal isolation?

• Condition in which a cell has more than two complete sets of chromosomes
• A diploid cell resulting from the fusion of two haploid gametes
• The formation of a new distinct species in the course of evolution
• A barrier that prevents species from mating because they breed at different times

What best defines Behavioral isolation?

• Courtship patterns used to allow male and female to recognize one another
• Even if the two gametes of two different species meet, they can not fuse to become a zygote
• When animal genitalia or plant floral structures are incompatible, reproduction can not occur
• Even if the two gametes of two different species meet, they can not fuse to become a zygote

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What is Adaptive radiation?

• A biological trait evolves in two unrelated species as a result of exposure to similar environments
• Largest-scale evolutionary changes that occur over time
• Traits that evolve convergently in two unrelated lineages because of a response to a similar lifestyle or habitat
• When single ancestral species rapidly give rise to a variety of new species as each adapts to a specific environment

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What is Convergent Evolution?

• Traits that evolve convergently in two unrelated lineages because of a response to a similar lifestyle or habitat
• A biological trait evolves in two unrelated species as a result of exposure to similar environments
• Traits that are similar because they evolved from the same ancestor
• The gradual evolution of new species

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What is Gradualistic model?

• Traits that are similar because they evolved from the same ancestor
• The gradual evolution of new species
• Traits that evolve convergently in two unrelated lineages because of a response to a similar lifestyle or habitat
• The assembly of species in the fossil record can be explained by periods of equilibrium.

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What is geographic isolation?

• Members of a population live together within an geographic boundary
• Members of a population may become isolated from one another by geographic boundaries
• An isolation that is geographic
• None of these

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What is reproductive isolation?

• When two populations can no longer produce offspring
• When two populations can no longer produce viable offspring
• When two populations can produce viable, fertile offspring
• When the two populations can no longer produce viable, fertile offspring

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