Starter quiz
- Which classification group would contain the most organisms?
- domain ✓
- species
- kingdom
- family
- class
-
- Match the names of the three domains to the organisms that are classified into them.
- eukaryota⇔animals, plants, fungi and protists ✓
- bacteria⇔true bacteria ✓
- archaea⇔extremophiles that live in extreme environments ✓
- What is the primary characteristic that distinguishes eukaryotic cells from prokaryotic cells?
- cell membrane
- membrane bound nucleus ✓
- cytoplasm
- cell wall
-
- What major advancement did Carl Woese contribute to the field of classification?
- introduction of the binomial naming system
- discovery of the structure of DNA
- development of the three-domain system ✓
- formulation of the theory of evolution
-
- What are the three domains proposed by Carl Woese in his classification system?
- bacteria ✓
- archaea ✓
- animals
- eukaryota ✓
- protists
-
- How did Linnaeus classify organisms in his classification system?
- based on genetic similarity and differences
- based on their ecological niche
- based on their observable and measurable characteristics ✓
-
Exit quiz
The model shown in the diagram is an evolutionary ...- 'tree' ✓
- According to this evolutionary tree, which two organisms are most closely related?
- A and B ✓
- B and C
- C and D
- D and E
-
- Which branching point, P, Q, R or S, shows the most recent common ancestor of species A, B, and C?
- P
- Q ✓
- R
- S
-
Which species is most closely related to species G?- H ✓
- I
- J
-
- How many differences are there between the gene sequence of species G and that of species J?
- '3' ✓
- Which evolutionary tree shows the relationship between the species shown in the table?
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Organisms can now be classified using evidence from sequencing their genes
- Comparing gene sequences provides evidence of evolutionary relationships
- Sometimes organisms are reclassified into a different group if new evidence is discovered
Common misconception
Organisms evolve over a short period of time.
Draw pupils attention to the tome scales on the evolutionary trees to show that evolution takes place slowly over long periods of time.
Keywords
Dna - Deoxyribonucleic acid is a chemical that carries genetic information, and it is the molecule of inheritance.
Gene sequence - the sequence of DNA that codes for a particular protein
Evolutionary trees - diagrams that show the evolutionary relationships between organisms
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