14 Inheritance and evolution 14.1 Pedigree 14.2 Big-horn sheep 14.3 Selective breeding for high milk yield.
74
75 77 79
15 Living organisms in their environment
81
16 Humans and the environment
86
15.1 Goats on an island 15.2 Fish tank
16.1 Eutrophication 16.2 Acid rain and wildlife in Canadian lakes
iv
IGCSE Biology
81 84
86 88