Biology 5090 · O Level · Cell structure and function

Cell structure and function — practice question

Certain plants are able to withstand severe dehydration for a prolonged period while dormant. When water becomes available, they begin to grow once more. These plants are adapted for life in deserts. Selaginella lepidophylla is one example of such a plant.
(a(i))[4]

Explain how the changes in the plant, shown in Fig. 4.1, will enable it to begin growing again after rainfall.

(a(ii))[4]

Fig. 4.2 shows the cell wall and nucleus of a cell from this plant after several months without water. Suggest and explain how the other parts of this cell would look after several months without water. You may draw on Fig. 4.2 to help answer.

(b(i))[2]

Explain what the term species means.

(b(ii))[2]

State the name of the scientific system used to name the species and suggest one advantage of using the scientific name instead of the common name.

Worked solution & mark scheme

This 12-mark question has a full step-by-step worked solution and mark scheme. One marking point: chloroplasts or chlorophyll

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