Evolutionary Mechanisms

 Genetic Drift is more likely to happen in... 

• aquatic populations
• small populations
• terrestrial populations
• older populations

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NGSS.HS-LS4-2

This mechanism of evolution occurs when populations migrate.

• Punctuated Equilibrium

• Gene flow

• Genetic drift

• Natural Selection

The type of genetic drift that follows the colonization of a new habitat by a small group of individuals is called

• genetic drift

• the founder effect

• gene flow

• the bottleneck effect

On island chains like the one shown below, animal populations that spread from the main island to the other islands can evolve into separate species. Which of the following best explains why speciation can occur in this situation? 

• Predators on the main island can easily migrate to follow the populations to the other islands.
• The physical separation of the islands from the main island limits gene flow and interbreeding between the populations.
• Lack of disease on the other island enables the populations to grow and change without limits.
• The climatic conditions of the islands allow the populations to breed all year long and produce several generations.

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A _____________________ involves a change in the genetic code of an organism.  Because this change occurs in the genetic code, it is passed on to future generations.

• Morphology
• Mutation
• Gene Flow
• Genetic Drift

Tags

NGSS.HS-LS3-2

Diversity is when...

• the species looks exactly the same

• there are differences and variety among species

• a species that is fit for its environment

• artificial selection is used for desired traits in plants and animals

Tags

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A genetic change causes these daisies to look like "chernobyl" daisies resulting in deformed centers.  The diversity of genes will likely increase in this daisy population.  This increase is due to--

• Genetic drift
• Gene flow
• Mutation
• Other evolutionary mechanisms

Tags

NGSS.HS-LS3-2

Wolves from the Arizona mesa were transferred to the Colorado Rockies after a forest fire destroyed their habitat. They quickly became part of the local pack and had offspring.

• Mutation
• Natural Selection
• Genetic Drift
• Gene Flow

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What type of evolution where there is a sudden, rapid change then no change for a long time?

• Gradualism

• Punctuated Equilibrium

• Gene Flow

• Convergent Evolution

Evolution occurring gradually and slowly over long periods of time

• Homeostasis

• Stasis

• Punctuated Equilibrium

• Gradualism

Tags

NGSS.HS-LS4-1