Biotic factors — AQA GCSE Biology
Test yourself on Biotic factors with AQA GCSE practice questions.
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Biotic factors explained
This skill requires reading data displays about biotic factors and turning them into biological conclusions.
Read the full explanation
A chart, graph or table might show how predator numbers change over time, how a disease outbreak affects population size, or how two competing species change in abundance. To extract information, read the axes, units, labels and key carefully, then identify the relevant data points. To interpret, describe the trend, compare values between species or time periods, and link the pattern to a biotic factor such as predation, disease, food supply or competition. For example, if a graph shows prey numbers falling after predator numbers rise, you can explain this as increased predation. Always quote figures from the display to support your answer.
Your focus
- Read and extract relevant data from charts, graphs and tables about biotic factors.
- Interpret trends and comparisons in data to explain effects on organisms in a community.
- Support conclusions with specific figures and units from the data display.
Biotic factors exam tips
Marking Points
- Read the axes, units, labels and key of a chart, graph or table accurately before selecting data.
- Identify the trend shown, such as an increase, decrease, plateau or fluctuation, and describe it using data values.
- Compare data for different species or time periods, quoting specific figures from the display.
- Link the pattern in the data to a named biotic factor, such as predation, disease, food availability or competition.
- Use the data to support a conclusion about the effect on organisms within the community, rather than describing the display alone.
Examiner Tips
- 💡Quote figures with units when describing a trend, for example 'the population fell from 500 to 200 between year 1 and year 5'.
- 💡Use comparative connectives such as 'whereas', 'compared with' and 'over the same period' when comparing two data sets.
- 💡Finish interpretation questions by naming the biotic factor and stating its effect on the organism or community.
- 💡Check whether the question asks you to extract information, interpret it, or both, and make sure your answer does what is asked.
Common Mistakes
- Describing the shape of a graph without quoting any data; correct this by including specific values or ranges from the axes.
- Mixing up the axes or misreading the scale, for example treating a logarithmic or non-linear scale as linear; correct this by checking the intervals and units before reading values.
- Giving a conclusion that is not supported by the data shown; correct this by linking every statement to a specific data point or trend in the display.