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3 (a) Carrots have different physical characteristics such as colour - Edexcel - GCSE Biology Combined Science - Question 3 - 2021 - Paper 1
Question 3
3 (a) Carrots have different physical characteristics such as colour. Which genetic term describes the physical characteristics of a carrot? A genotype B monohyb... show full transcript
Worked Solution & Example Answer:3 (a) Carrots have different physical characteristics such as colour - Edexcel - GCSE Biology Combined Science - Question 3 - 2021 - Paper 1
Step 1
Give one reason why the student used three carrot sticks instead of just one carrot stick.
Answer
Using three carrot sticks instead of one ensures that the results are more reliable and less affected by anomalies. By averaging the results from multiple samples, the impact of any outlier can be minimized, leading to more accurate conclusions.
Step 2
Give two ways that this method could be improved.
Answer
- Measure the length and width of the carrot sticks to ensure uniformity in size, which would contribute to consistency in mass changes.
- Use the same variety of carrot to avoid variation in water absorption characteristics that may affect the results.
Step 3
Step 4
Explain the change in mass of the carrot sticks.
Answer
The mass of the carrot sticks increased due to the absorption of water from the distilled water in which they were placed. Water molecules entered the carrot cells through osmosis, a process where water moves from an area of lower solute concentration (the distilled water) to an area of higher solute concentration (inside the carrot cells). This results in swelling and an increase in mass.