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AQA GCSE · Question 06.2 · Organisation
Describe the relationship between the size of a jellyfish and its surface area to volume ratio. Use Table 4.
Describe the relationship between the size of a jellyfish and its surface area to volume ratio. Use Table 4.
How to approach this question
1. Look at the "Size of jellyfish" column. The arrow shows it goes from smallest to largest.
2. Look at the "Surface area to volume ratio" column. Read the first number of the ratio for each jellyfish: 3, 2, 0.3, 0.06.
3. Describe what happens to the ratio as you go down the column (i.e., as the jellyfish gets larger). Does the number get bigger or smaller?
4. Formulate a sentence that links the two trends, e.g., "As [size] does this, the [ratio] does that".
Full Answer
As the size of the jellyfish increases, its surface area to volume ratio decreases.
To describe the relationship, we need to compare the trend in two columns.
- The "Size of jellyfish" column goes from smallest (A) to largest (D).
- The "Surface area to volume ratio" column values are 3:1, 2:1, 0.3:1, and 0.06:1. The first number in the ratio is decreasing (3 → 2 → 0.3 → 0.06).
Therefore, the relationship is that as the size of the organism increases, its surface area to volume ratio decreases. This is a fundamental principle in biology. Smaller organisms have a larger surface area relative to their volume compared to larger organisms.
Common mistakes
✗ Just stating the numbers without describing the relationship (e.g., "The ratio goes from 3 to 0.06").\n✗ Describing the relationship incorrectly (e.g., "as size increases, the ratio increases").
Practice the full AQA GCSE Biology Foundation Tier Paper 1
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