Worksheet: Theories of Evolution

In this worksheet, we will practice recalling Darwin and Wallace's contribution to the theory of evolution, and explaining the process of evolution by natural selection.

Q1:

Which of the following definitions most accurately describes a species?

  • AA species is a group of organisms that are physically identical.
  • BA species is a group of similar organisms that can reproduce to give fertile offspring.
  • CA species is a group of organisms that share a common ancestor in the last millennia.
  • DA species is a large group of organisms that inhabit the same ecological space.
  • EA species is a group of similar organisms that can reproduce.

Q2:

The process of natural selection is outlined below. Fill in the blanks in the following statements.

Populations naturally show in their characteristics.

  • Acompetition
  • Bvariation
  • Cdifferentiation
  • Dgenotypic frequencies

conditions in an area change causing more competition between individuals.

  • ACommensal
  • BEnvironmental
  • CMorphological
  • DGenotypic

By chance, some individuals are better for this change and survive.

  • Aacquired
  • Basserted
  • Cadapted
  • Daided

The survivors reproduce and pass on these to their offspring.

  • Aadvantageous phenotypes
  • Bdisadvantageous alleles
  • Cacquired characteristics
  • Dadvantageous alleles

Q3:

Which scientist proposed the idea that organisms evolved certain features by using them more throughout their lifetime, also known as acquired characteristics?

  • AWatson
  • BDarwin
  • CLamarck
  • DFranklin
  • EWallace

Q4:

What book helped explain Darwin and Wallace’s ideas about evolution to the general public?

  • ANatural Selection and Evolution
  • BOn the Origin of Species
  • CEvolution Explained
  • DThe History of the Species
  • EThe Voyage of the Beagle

Q5:

Which of the following best explains why Lamarck’s hypothesis about evolution was rejected?

  • AThe evidence did not support his ideas.
  • BHe never published or spoke about his theories.
  • CHe was not well liked in the scientific community.
  • DPeople were not able to view animals and their adaptations.

Q6:

African elephants have evolved large ears over time that help them cool down. What was the selection pressure in this evolutionary process?

  • ATraveling long distances
  • BAttracting mates
  • CAdapting to the temperature/climate
  • DAvoiding predation
  • EFood availability

Q7:

Different scientists proposed different hypotheses about how organisms changed over time. Which of the following best explains the term “hypothesis”?

  • AA hypothesis is a possible explanation for an observation.
  • BA hypothesis is a proven reason for why something happens.
  • CA hypothesis is a set of instructions to be followed to prove or disprove an idea.
  • DA hypothesis is a written conclusion from a scientific experiment.
  • EA hypothesis is an incorrect idea for a natural process.

Q8:

Which of the following processes allows new genetic variants to arise in a population?

  • AMaturation
  • BMutation
  • CSpecialization
  • DMitosis
  • EReplication

Q9:

Variations in alleles produce different observable characteristics in organisms. What term is given to the physical characteristics of an organism?

  • AMutations
  • BPhenotype
  • CPhylogeny
  • DGenotype
  • EExternal traits

Q10:

Ground finches have evolved a large, powerful beak for crushing seeds. What was the selective pressure in this evolutionary process?

  • AFlying long distances
  • BAdapting to the temperature/climate
  • CFood availability
  • DAttracting mates
  • EAvoiding predation

Q11:

Which of the following is the best explanation for the connection between natural selection and evolution?

  • ANatural selection is when evolution occurs repeatedly and over time causes a change in the characteristics of a species.
  • BEvolution is when natural selection occurs repeatedly and over time causes a change in the characteristics of a species.

Q12:

A population of organisms will naturally show differences in their characteristics. Which of the following is the correct term for this?

  • ACharacterization
  • BSelection
  • CSpeciation
  • DVariation
  • EDifferentiation

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