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A student draws diagrams to show the position of xylem in different parts of a plant. Fig. 4.1 shows the student’s drawings. leaf xylem root xylem stem xylem phloem Fig. 4.1 The student made errors in labelling the drawings. Identify two errors made by the student in Fig. 4.1.
See it on the paper →Red blood cells are found inside capillaries. Explain how the structure of capillaries is adapted to their function.
See it on the paper →On the grid, plot a graph of time for mixture to become opaque (vertical axis) against temperature.
See it on the paper →Draw a circle around the point of the anomalous result.
See it on the paper →State if the anomalous result is too high or too low. Suggest what happened to cause this anomalous result. anomalous result is too suggestion
See it on the paper →Draw the best-fit curve.
See it on the paper →On Fig. 1.2 use a label line and the letter X to label any part of the xylem.
See it on the paper →This proved to be quite a challenging question. Some candidates stated that “the root was the stem and the stem was the root” but this gained only partial credit. Credit could not be awarded for vague answers such as “root and stem”. Some candidates missed the point that the root and stem diagrams were interchanged and made suggestions such as “the stem should not have projections”. Others describ...
— Examiner report, February/March 2024, 0653/42 Q4(a) (Cambridge)
Stronger candidates had learned that thin walls are a key feature of the structure of capillaries and avoided answers such as ‘capillaries are thin’ or ‘capillaries are only one cell thick’. Any wording that described efficient exchange of substances was accepted for the second mark. Credit was not awarded for vague, unqualified references to ‘easy diffusion’.
— Examiner report, February/March 2022, 0653/42 Q4(d) (Cambridge)
Candidates need to read the instructions for a graph carefully. The question asked candidates to plot a graph of time (vertical axis) against temperature. Some candidates had the axes the wrong way around. It is also important that axis labels include units. These were frequently omitted. Candidates need to consider two factors in their choice of scale: that the scale is linear and that it allows...
— Examiner report, October/November 2020, 0653/63 Q3(b)(i) (Cambridge)
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