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Refer to the following graph that shows the extinction rate of families - VCE - SSCE Biology - Question 29 - 2019 - Paper 1
Question 29
Refer to the following graph that shows the extinction rate of families.  A scientist stated that a ma... show full transcript
Worked Solution & Example Answer:Refer to the following graph that shows the extinction rate of families - VCE - SSCE Biology - Question 29 - 2019 - Paper 1
Step 1
State the number of mass extinction events recorded on the graph above is:
Answer
To determine the number of mass extinction events where the extinction rate was eight families per million years or greater, we need to analyze the graph provided.
By observing the graph, the points that exceed the threshold of eight families per million years must be counted. From the graph data, it can be noted that there are a total of eight distinct occurrences where the extinction rate meets or exceeds this threshold. Thus, the answer is:
- eight.