Classification of Living Organisms Practice Questions

Complete the table to give the names of the three missing classification groups.

Give the binomial name of the common octopus.

Use information from the table.

Two other sea animals are the California two-spot octopus (Octopus bimaculoides) and the giant Pacific octopus (Enteroctopus dofleini).

Which of these two animals is more closely related to the common octopus?

Give a reason for your answer.

Complete the table to give the names of the two missing domains.

Yeast is a single-celled fungus.

Which domain does yeast belong to?

Tick (✓) one box.

• Archaea
• Bacteria
• Eukaryota

Give the type of evidence that allowed Woese to develop the three-domain system.

Which two species are the most closely related?

Which species is the least closely related to species A?

Scientists produce evolutionary trees using data from living organisms and from extinct organisms.

Give the type of data used for:

• living organisms
• extinct organisms

Give the genus of the great crested newt.

Scientists bred a great crested newt with a smooth newt in a laboratory. A small number of offspring were produced. All of these offspring were infertile.

Explain what this shows about the classification of the two newts.

In some parts of the UK the smooth newt is called the 'common newt'.

Explain why scientists use the binomial system to name organisms instead of using common names.

Describe how Linnaeus classified living organisms.

Explain how developments in biology since the time of Linnaeus have led to new models of classification.

Which organism in the table is the most closely related to Saccharomyces cerevisiae?

Use data from the table to explain your answer.

Scientists now place Methanocaldococcus jannaschii in the domain Archaea and not with the bacteria.

Explain how evidence of the type shown in the table led scientists to develop the three-domain system.