UNIT VI
REPRODUCTION 1-66
Chapter 1 : Reproduction in Organisms 3
Chapter 2 : Sexual Reproduction in Flowering Plants 19
Chapter 3 : Human Reproduction 42
Chapter 4 : Reproductive Health 57

UNIT VII
GENETICS AND EVOLUTION 67-142
Chapter 5 : Principles of Inheritance and Variation 69
Chapter 6 : Molecular 13asis of Inheritance 95
Chapter 7 : Evolution 126

UNIT VIII
BIOLOGY IN HUMAN WELFARE 143-190
Chapter 8 : Human Health and Disease 115
Chapter 9 : Strategies for Enhancement in Food Production 165
Chapter 10 : Microbes in Human Welfare 179

UNIT IX
BIOTECHNOLOGY 191-216
Chapter 11 : Biotechnology : Principles and Processes 193
Chapter 12 : Biotechnology and its Applications 207

UNIT X
ECOLOGY 217-286
Chapter 13: Organisms and Populations	219
Chapter 14: Ecosystem		241
Chapter 15: Biodiversity and Conservation		258
Chapter 16: Environmental Issues		270