Biology 5090/62 — May/June 2010
Cambridge O-Level · Alternative to Practical · worked solutions for every part, with the mark scheme
Topics Experimental Contexts · Planning Experiments and Investigations · Analysis, Conclusions and Evaluation · Microscopy and Biological Drawing · Use of Techniques, Apparatus and Materials
Fig. 1.1 shows a section through a flower belonging to the pea family.
Make a large labelled drawing of the carpel of the flower.
Suggest and explain how pollination might take place in this flower.
Fig. 1.2 shows a detailed photograph of the pollen grains on the end of the carpel.
By means of fully labelled diagram(s), show what happens to a pollen grain from this stage shown in Fig. 1.2 to the time fertilisation takes place.
Fig. 1.3 shows a section through a fruit developed from a carpel of the flower in Fig. 1.1.
Label two structures on Fig. 1.3 other than a seed.
The seeds when developed are used as food. Fig. 1.4 shows a different type of pea known as ‘Mangetout’, in which the whole fruit, including the seeds, is eaten.
The apparatus in Fig. 1.5 can be used to measure the energy content of food.
Design an investigation that you could carry out to compare the energy content of the two foods in Fig. 1.3 and Fig. 1.4. Include safety factors in your design.
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