10.      REPRODUCTION  
10.1.Meiosis
10.2.Reproduction in plants
10.2.1.  Fertilization
10.2.2.  Seed and fruit Development
10.2.3.  Life cycles
10.3.Reproduction in Animals
10.3.1.  Oestrus
10.3.2.  Fertilization and zygote Development in mammals
10.3.3.  Birth and Parental Care
10.3.4.  Life cycles