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The following graph compares the hearing of humans with the hearing of two flying foxes - VCE - SSCE Biology - Question 25 - 2007 - Paper 1
Question 25
The following graph compares the hearing of humans with the hearing of two flying foxes. The threshold is a measure of sensitivity where the higher the value, the l... show full transcript
Worked Solution & Example Answer:The following graph compares the hearing of humans with the hearing of two flying foxes - VCE - SSCE Biology - Question 25 - 2007 - Paper 1
Step 1
A. It is more difficult for a human to hear the sound if it has a frequency of 1 kHz than if it has a frequency of 10 kHz.
Answer
According to the graph, the threshold for humans at 1 kHz is significantly higher than at 10 kHz. This means that more sound volume is needed for the human to hear the lower frequency, confirming that it is indeed more difficult for humans to hear the sound at 1 kHz.
Step 2
B. A grey-headed flying fox can hear sound at 10 kHz better than the little red flying fox.
Answer
The graph indicates that at 10 kHz, the threshold for the grey-headed flying fox is lower than that for the little red flying fox. This suggests that the grey-headed flying fox possesses better hearing sensitivity at this frequency, thereby being able to hear sounds clearer than the little red flying fox.
Step 3
C. A grey-headed flying fox hears all sounds better than the little red flying fox whatever the frequency of the sound.
Answer
This statement is not accurate as the graph shows varying thresholds for both flying foxes across different frequencies. Therefore, while the grey-headed flying fox may have better sensitivity at certain frequencies, it does not hold true for all frequencies.
Step 4
D. At frequencies below 1 kHz, humans have more difficulty hearing the sound than both flying foxes.
Answer
The graph illustrates that at frequencies below 1 kHz, the threshold for humans is higher than that of both flying foxes. This indicates that humans do indeed struggle more with low-frequency sounds compared to the flying foxes, thus supporting this statement.