page 10 16. Humans and many other primates have opposable thumbs. In the giant panda, a modified wrist bone forms a false ‘thumb’ which is used along with the five digits to manipulate bamboo. The list shows processes related to evolution. 1 Convergent evolution 2 Divergent evolution 3 Natural selection Evolution of the thumbs of primates and the false ‘thumbs’ of giant pandas has involved A 1 only B 2 only C 1 and 3 only D 2 and 3 only. 17. Which statement includes representatives of all three domains of life? A Insects can be vectors for bacterial infections in plants. B Photoreceptor proteins are found in archaea, plants and animals. C Scientists have cloned genes from archaea that can be expressed in Escherichia coli. D Diseases in potato crops can be caused by the transmission of viruses by nematodes.