Worksheet: Classification

In this worksheet, we will practice naming and classifying organisms, and describing the changes to the biological classification system.

Q1:

From largest to smallest, which of the following is the correct order of the taxonomic levels?

  • AKingdom phylum class order family species genus
  • BKingdom phylum class order family genus species
  • CKingdom phylum order class genus family species
  • DPhylum kingdom class order family genus species
  • ESpecies kingdom phylum class order family genus

Q2:

Biological classification systems have changed over time. Previously, biologists used artificial classification to group organisms, but natural classification methods are now much more common.

Which of the following describes artificial classification?

  • AGrouping organisms together using observable characteristics
  • BUsing DNA sequencing to group organisms based on evolutionary links

Which of the following describes natural classification?

  • AGrouping organisms together using observable characteristics
  • BUsing DNA sequencing to group organisms based on evolutionary links

Q3:

Which of the following is an assumption scientists make when classifying organisms based on genetic analysis?

  • AThe more DNA two organisms have in common, the more recently they shared a common ancestor.
  • BThe more DNA two organisms have in common, the less recently they shared a common ancestor.
  • COrganisms have only shared a common ancestor if they have identical DNA.

Q4:

The binomial naming system was developed by Carl Linnaeus. Each organism has a Latin name consisting of two parts, its genus and its species.

The binomial name for a lion is Panthera leo. What is a lion’s genus?

  • Aleo
  • BPanthera
  • CUnknown

The binomial name for a Venus flytrap is Dionaea muscipula. What is a Venus flytrap’s species?

  • Amuscipula
  • BDionaea
  • CUnknown

The binomial name for humans is Homo sapiens. What genus do we belong to?

  • AHomo
  • BUnknown
  • Csapiens

Q5:

What process was used to determine that organisms should be grouped into three domains rather than 5 kingdoms?

  • AObservational analysis
  • BCulturing
  • CGenetic engineering
  • DGenetic analysis
  • EReproduction

Q6:

Which of the following best describes the difference between the DNA of bacteria and the DNA of eukaryotes?

  • AEukaryotes do not contain any unused sections of DNA, but bacteria do.
  • BBacterial DNA contains uracil instead of thymine.
  • CEukaryotic DNA contains uracil instead of thymine.
  • DThere are no differences between the DNA of bacteria and eukaryotes.
  • EBacteria do not contain any unused sections of DNA, but eukaryotes do.

Q7:

Which of the following best describes a species?

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

Q8:

Which of the following correctly states the 5 kingdoms?

  • AAnimals, plants, fungi, protists, prokaryotes
  • BAnimals, plants, fungi, bacteria, prokaryotes
  • CAnimals, plants, fungi, birds, microorganisms
  • DAnimals, plants, algae, protists, prokaryotes
  • EAnimals, plants, fungi, protists, viruses

Q9:

Which of the following is not correct about the genetics of the three domains?

  • ABacteria have genes with no unused sections of DNA.
  • BArchaea have genes with unused sections of DNA.
  • CArchaea have cells that contain a nucleus.
  • DEukaryota have cells that contain a nucleus.
  • EBacteria cells do not have a nucleus.

Q10:

The diagram given shows a basic outline of the three domains.

Which of the following is correct about the evolution of the domains?

  • AArchaea and Bacteria evolved from a different common ancestor than that of Eukaryota.
  • BArchaea and Eukaryota shared a common ancestor more recently than Eukaryota and Bacteria.
  • CBacteria and Eukaryota shared a common ancestor more recently than Eukaryota and Archaea.

Which of the following is correct about the evolution of Eukaryota?

  • AFungi and plants shared a common ancestor more recently than fungi and animals.
  • BFungi and animals shared a common ancestor more recently than fungi and plants.
  • CFungi and plants evolved from a different common ancestor than animals.

Q11:

Which of the following is the correct definition of classification?

  • AClassification is the organization of living things into groups that have similar features.
  • BClassification is the organization of living things into groups that have different features.
  • CClassification is the organization of dead things into groups that have similar features.
  • DClassification is the organization of organisms into large mixed groups.
  • EClassification is the organization of organisms into groups that inhabit the same area.

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