Causes of Microevolution: Natural Selection, Gene Flow & Genetic Drift


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question 1 of 3

There are two populations of the same species of grass across a roadway from each other. The wind blows their pollen back and forth, transferring alleles between the two populations. This is an example of

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1. A strong earthquake causes a chunk of land to fall off and float away as a new island. The individuals on this new island reproduce separately from the population on the mainland, changing the allele frequencies among them. This is an example of:

2. Which of the following is true about natural selection?

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About This Quiz & Worksheet

Some of the questions on this quiz will present you with a sample scenario involving populations and alleles and ask you to identify what it exemplifies. Other questions ask you to differentiate between true/false statements related to microevolution.

Quiz & Worksheet Goals

Prepare to answer quiz questions on the following:

  • The movement of alleles between populations
  • The phrase describing when a few individuals establish a new population
  • Facts about natural selection and microevolution
  • What causes the bottleneck effect

Skills Practiced

While you boost your knowledge of microevolution with this quiz and worksheet, you'll also be working on the following skills:

  • Reading comprehension - ensure that you draw the most important information from the related lesson on microevolution causes
  • Interpreting information - verify that you can read information regarding how the bottleneck effect occurs and interpret it correctly
  • Knowledge application - use your knowledge to answer questions about microevolution scenarios

Additional Learning

Continue your studies with the associated lesson, Causes of Microevolution: Natural Selection, Gene Flow & Genetic Drift. You'll work towards the following objectives:

  • Understand the meaning of species level evolution
  • Review the mechanisms that affect gene pools
  • Examine the two situations in which genetic drift is most impactful on populations