biology UNIT-12-plant anatomy and plant physiology UNIT-13- Structural organisation of animals UNIT-14- transportation in plants and circulation in animals UNIT-15- nervous system UNIT-16- plant and animal hormone UNIT-17- reproduction in plants and animals UNIT-18- genetics UNIT-19-origin and evolution of life UNIT-20-breeding and biotechnology UNIT-21-health and diseases UNIT-22-environmental management