AQA GCSE Combined Science: Trilogy Biology Paper 2 (Foundation), 2021: Question 4
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04 A fossil was found in rocks. The rocks were formed from mud.
The fossil is of the fungus Ourasphaira giraldae.
04.1 What is the genus of the fungus?
[1 mark]
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Giraldae
Ourasphaira
Ourasphaira giraldae
04.2 The mud around the fungus did not contain oxygen.
Which process did the mud around the fungus prevent?
[1 mark]
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Decay
Geological activity
Photosynthesis 16
04.3 The fossilised fungus is estimated to be 890 000 000 years old.
What is 890 000 000 in standard form?
[1 mark]
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8.9 × 106
8.9 × 107
8.9 × 108
8.9 × 109
04.4 Traditional classification divided organisms into kingdoms.
Who developed the traditional system of classification?
[1 mark]
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Carl Linnaeus
Carl Woese
Charles Darwin 17
04.5 More recent classification methods use a three-domain system.
What is the name of the domain the fungus Ourasphaira giraldae is classified in?
[1 mark]
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Bacteria
Eukaryota
Plants
04.6 Why has classification changed over time?
[1 mark]
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Electron microscopes allow more detail to be seen inside cells.
Many more types of organisms have become extinct.
Some fossils are buried so deep that they may never be discovered.
04.7 The fungus Ourasphaira giraldae is now extinct.
Give two possible causes of extinction.
[2 marks]
Mark scheme
Show the mark scheme
AO /
Question Answers Extra information Mark
Spec. Ref.
04.1 Ourasphaira 1 AO2
4.6.4
04.2 decay 1 AO2
4.6.3.2
04.3 8.9 × 108 years old 1 AO2
4.6.3.2
04.4 Carl Linnaeus 1 AO1
4.6.4
04.5 eukaryota 1 AO1
4.6.4
04.6 electron microscopes allow 1 AO1
more detail to be seen inside 4.6.4
cells
04.7 any two from: 2 AO1
4.6.3.3
• drought if none of these, allow climate
• ice age change for 1 mark
• global warming
ignore weather
• volcanic activity if neither of these, allow
• asteroid collision catastrophic event or natural
disaster for 1 mark
• (new) predators allow named example
allow hunters
• (new) disease / pathogen allow named example 13
• competition for food allow lack of food
• competition for mates allow lack of mates
ignore competition unqualified
• lack of habitat ignore environment change
or habitat change ignore isolation
ignore pollution
Total 8
Question and mark scheme from the AQA GCSE Combined Science: Trilogy examination, Biology Paper 2 (Foundation), 2021. QuestionVault is an independent revision resource; questions remain the copyright of the awarding body.