Lesson Worksheet: Speciation Biology

In this worksheet, we will practice explaining the process by which new, separate species can arise from a founding population.


Which scientist spent many years gathering evidence from natural populations to support the theory of speciation?

  • AWallace
  • BMendel
  • CFranklin
  • DWatson
  • EDarwin


If a population cannot adapt to a new environment, it becomes extinct. Which of the following correctly defines extinction?

  • AMost individuals of a species are dead.
  • BThe genetic variation of a population is drastically reduced.
  • CAll individuals of a species are permanently lost.
  • DThe death rate of a population is higher than the birth rate.
  • EA species is at risk of not having any surviving members.


In speciation, what conditions change and provide the selective pressure?

  • ACommunicative
  • BTemporary
  • CEnvironmental
  • DPhenotypic
  • EGenetic


Fill in the blanks: In isolated populations, different mean different are advantageous and are therefore selected for.

  • Agenomes, genes
  • Balleles, environments
  • Cconditions, environments
  • Denvironments, alleles
  • Ealleles, genes


What is the process by which two species evolve from a single-origin species due to isolation?

  • ASpecialization
  • BDifferentiation
  • CClassification
  • DSpeciation
  • EDetermination


In speciation, which of the following options best describes when the separated population and the original population are considered to be two distinct species?

  • AWhen individuals from each group specialize to eat a certain food source
  • BWhen individuals from each group look different enough
  • CWhen there has been one set of offspring from every individual in the new group
  • DWhen individuals from each group can no longer reproduce to create fertile offspring
  • EWhen individuals from each group can no longer mate


Which scientific term is given to the following definition: A group of similar organisms that reproduce to give fertile offspring?

  • AKingdom
  • BSpecies
  • CGenus
  • DClass
  • EFamily

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