Photo AI
A group of students observed that the mating calls of a population of frogs at the local dam had recently become much louder - NSC Life Sciences - Question 3 - 2019 - Paper 2
Question 3
A group of students observed that the mating calls of a population of frogs at the local dam had recently become much louder. The dam is close to a highway, where tr... show full transcript
Worked Solution & Example Answer:A group of students observed that the mating calls of a population of frogs at the local dam had recently become much louder - NSC Life Sciences - Question 3 - 2019 - Paper 2
Step 1
3.1.1 Explain the advantage of a louder mating call.
Answer
A louder mating call can be advantageous as it allows the call to be easily heard over longer distances. This increases the likelihood of attracting a mate, ensuring reproductive success. Additionally, it can help signal presence to other males, establishing territory.
Step 2
3.1.2 State why these results may be considered to be reliable.
Answer
The results may be considered reliable as the investigation was conducted over a long period (6 years) and several recordings were taken each year to calculate an average. This systematic approach increases the validity of the findings.
Step 3
3.1.3 State a conclusion for this investigation.
Answer
As the traffic noise increased, the loudness of the frogs' mating calls also increased. This suggests a potential evolutionary adaptation where frogs may be evolving to have louder calls in response to increased background noise, possibly to maintain communication and attract mates.
Step 4
Step 5
3.1.5 Draw line graphs on the same set of axes to show the change in average loudness of traffic noise and mating calls for the period 2006 to 2009.
Answer
To draw the graphs, plot the years (2006 to 2009) on the x-axis and the corresponding average loudness (in dB) on the y-axis. Use one line for traffic noise and another for mating calls, ensuring to label each line and include a legend.