The aye-aye, Daubentonia madagascariensis, is a primate native to Madagascar. Aye-ayes are nocturnal (active at night) and make their nests high up in trees. They feed on insect larvae in the trunks of trees. Fig. 1.1 shows an aye-aye. [Figure 1.1] The International Union for Conservation of Nature (IUCN) is the world's largest global environmental organisation. The IUCN Red List of Threatened Species™™ evaluates the conservation status of plant and animal species. The aye-aye is categorised as endangered on the IUCN Red List, which means that it faces a very high risk of becoming extinct in the wild.

1. (a)(i)Name the domain to which the aye-aye belongs.[1]
2. (a)(ii)Suggest one reason why aye-ayes have become endangered.[1]
3. (a)(iii)Suggest ways in which zoos may help to protect this species from extinction.[3]
4. (b)(i)With reference to Fig. 1.2, suggest why there is a large genetic difference between the two populations.[4]
5. (b)(ii)Name the type of speciation that may be occurring.[1]
6. (b)(iii)Suggest and explain a pre-zygotic isolating mechanism that could prevent successful reproduction between aye-ayes of the two populations.[2]

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.