Description: Segment 1 Examples of mould on fruit, leather, clothes and bread are shown. A magnified view of mould is shown, including mould spores. An animation showing the growth of mould is shown. Time start: 00:00:00:00 Time end: 00:04:04:03 Length: 00:04:04:03 Segment 2 The intertitles explain that many moulds have two different strains and that spores can be formed by the union of the two strains. Footage of growing mould is seen. Protoplasm and oil flowing through the tubes of growing mould is shown. The intertitles explain that yeast is a mould-like plant that grows in sugar solution. A scientist activates some yeast and a magnified view of yeast is shown. An animation shows yeast development. Yeast is shown being used in bread making. Time start: 00:04:04:03 Time end: 00:08:31:13 Length: 00:04:27:10