Worksheet: Speciation

In this worksheet, we will practice using Darwin and Wallace's ideas about evolution to explain how new species arise.

Q1:

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

  • AFranklin
  • BWallace
  • CDarwin
  • DWatson
  • EMendel

Q2:

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

Q3:

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

  • AFamily
  • BGenus
  • CSpecies
  • DKingdom
  • EClass

Q4:

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

  • APhenotypic
  • BTemporary
  • CGenetic
  • DEnvironmental
  • ECommunicative

Q5:

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

  • Aalleles, environments
  • Bconditions, environments
  • Cgenomes, genes
  • Dalleles, genes
  • Eenvironments, alleles

Q6:

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

  • AAll individuals of a species are permanently lost.
  • BThe death rate of a population is higher than the birth rate.
  • CMost individuals of a species are dead.
  • DA species is at risk of not having any surviving members.
  • EThe genetic variation of a population is drastically reduced.

Q7:

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

  • ADifferentiation
  • BSpeciation
  • CSpecialization
  • DDetermination
  • EClassification

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