A fossil was found in rocks - AQA - GCSE Biology Combined Science - Question 3 - 2021 - Paper 2
Question 3
A fossil was found in rocks. The rocks were formed from mud.
The fossil is of the fungus Ourasphaira giraldeae.
1. What is the genus of the fungus?
2. Why was the ... show full transcript
Worked Solution & Example Answer:A fossil was found in rocks - AQA - GCSE Biology Combined Science - Question 3 - 2021 - Paper 2
Step 1
What is the genus of the fungus?
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Answer
The genus of the fungus is Ourasphaira.
Step 2
Why was the mud important during the formation of the fossil?
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Answer
The mud was important during the formation of the fossil because the mud stopped oxygen reaching the fungus.
Step 3
Calculate the size of the range of the estimated age of the fossil.
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To calculate the size of the range of the estimated age of the fossil:
The lower end is 8.9 x 10^6 years.
The upper end is 1.1 x 10^7 years.
Size of range = (1.1 x 10^7) - (8.9 x 10^6)
Size of range = 2.1 x 10^6 years.
Thus, the size of the range is 2.1 x 10^6 years.
Step 4
Suggest one other reason why an accurate estimation of when this species of fungus existed is not known.
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One other reason why an accurate estimation of when this species of fungus existed is not known is that fossils of the fungus may have been destroyed by geological activity.
Step 5
Which domain are fungi classified in?
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Fungi are classified in the domain Eukarya.
Step 6
Which two characteristics are features of organisms in the domain Archaea?
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The two characteristics that are features of organisms in the domain Archaea are:
Can survive in extreme environments.
Cytoplasm contains DNA.
Step 7
Give three types of evidence that are used now to classify living things.
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Three types of evidence that are used to classify living things now include:
Studies of internal or cell structures with light microscopes.
Studies of internal or cell structures with electron microscopes.
