Photo AI
5 (a) Carrots have different physical characteristics such as colour - Edexcel - GCSE Biology - Question 5 - 2021 - Paper 1
Question 5
5 (a) Carrots have different physical characteristics such as colour. Which genetic term describes the physical characteristics of a carrot? A genotype B monohybrid... show full transcript
Worked Solution & Example Answer:5 (a) Carrots have different physical characteristics such as colour - Edexcel - GCSE Biology - Question 5 - 2021 - Paper 1
Step 1
Step 2
5(b) ii. Any two ways to improve the experiment.
Answer
To improve the experiment, the following methods can be considered:
- Measure the length and width of the carrot sticks before weighing them to ensure consistency in size.
- Use sticks from the same carrot or the same part of the carrot to standardize conditions.
Step 3
5(b) iii. Calculate the percentage change in mass for carrot stick Q.
Answer
To calculate the percentage change in mass for carrot stick Q:
-
Use the formula for percentage change:
ext{Percentage Change} = rac{ ext{Change in Mass}}{ ext{Initial Mass}} imes 100
-
For carrot stick Q:
- Initial Mass = 4.2 g
- Final Mass = 5.0 g
- Change in Mass = 5.0 g - 4.2 g = 0.8 g
-
Plug the values into the formula:
ext{Percentage Change} = rac{0.8}{4.2} imes 100 \\ = 19.05 \\ ext{(rounded to two significant figures as } 19 ext{)}
Step 4
5(b) iv. Explain why the carrot sticks gained mass.
Answer
The increase in mass of the carrot sticks can be explained as follows:
- The carrot sticks gained mass because they absorbed water from the distilled water solution.
- This water moved into the carrot cells by osmosis, which is the process of water moving across a semi-permeable membrane from a region of lower solute concentration to a higher concentration.