The syllabus for Standard Grades does not mention the word ‘evolution’. Pupils simply have to be aware that selection favours those individuals that leave most surviving offspring.

The aim of this topic is to stress the unity of life by developing a knowledge and understanding of those structures and processes shared by all living organisms

The implication here is that biological features shared by living organisms are evidence that they all evolved from a common ancestor. This argument from homology needs to be critically examined because it is by no means as simple as it sounds here. See the essay on homology on this website.