Complete the boxes in Fig. 6.1 by writing the letters of the bases on strand 2 that pair with the corresponding bases on strand 1.
State the name given to the structure of a DNA molecule shown in Fig. 6.1.
Using Fig. 6.2, count the differences between the DNA sequences for species C and species D, and also for species G and species H. Enter your answers in Table 6.1.
State which two plant species in Table 6.1 are the least closely related to one another.
Use the data in Table 6.1 to finish the classification tree in Fig. 6.3. Place the letter for species B, C, D and G in the box beside the matching branch of the classification tree.
Name the method used to transfer genes from one organism into another.
Give two further examples of crop plants altered by gene insertion. State one advantage for each example.