Biology 5090 · O Level · Sexual reproduction in plants
Sexual reproduction in plants — practice question
Fig. 3.1 illustrates the entire one-seeded fruit from a dandelion flower. One dandelion flowerhead may form as many as 200 of these one-seeded fruits. The mass of one fruit is $0.0005\,\text{g}$.
(a(i))[4]
In the space below, draw a large version of the complete fruit exactly as shown in Fig. 3.1.
(a(ii))[3]
C and D show the full length of the seed and stalk. On Fig. 3.1, draw a straight line to join C and D. Measure the line length and write it down.
Calculate the actual length of the seed and stalk and give it to the nearest whole number.
(b)[2]
Identify two features of this fruit that indicate adaptation for dispersal by wind. Explain your answers.
Worked solution & mark scheme
This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Complete fruit drawn with a sharp pencil, using clear continuous lines and no shading” …