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Figure 4 shows two potato chips - Edexcel - GCSE Biology Combined Science - Question 2 - 2018 - Paper 1
Question 2
Figure 4 shows two potato chips. Figure 5 shows some information about each potato chip. - potato chip - length of X in cm - length of Y in cm - length of Z in cm ... show full transcript
Worked Solution & Example Answer:Figure 4 shows two potato chips - Edexcel - GCSE Biology Combined Science - Question 2 - 2018 - Paper 1
Step 1
Calculate the total surface area of potato chip B using the formula
Answer
To calculate the total surface area of potato chip B, we use the formula:
Substituting the values for chip B:
- X = 5.0 cm
- Y = 2.0 cm
- Z = 2.0 cm
We calculate:
-
Calculate each component:
- cm²
- cm²
- cm²
-
Adding these together:
Thus, the total surface area of potato chip B is 48.0 cm².
Step 2
Chip B has a greater surface area
Answer
This is because chip B has larger dimensions compared to chip A, which results in a greater surface area due to the formula for total surface area being based on the length measurements (X, Y, Z). Specifically, chip B has more cells, thereby increasing its surface area.
Step 3
Explain one difference in the sub-cellular structures in a cell in the potato and those in a cell in the leaf of the potato plant
Answer
One primary difference is that potato cells do not contain chloroplasts, as they develop underground and are not involved in photosynthesis. In contrast, leaf cells contain chloroplasts that enable them to conduct photosynthesis, utilizing sunlight to create energy.