secondary sector : industry
the origin of cells and cell division
physical properties of metals and non-metals
solid state
basics of metallurgy
indian economy on the eve of independence
human geography in tamil nadu
in the land of kerala
diversity in living world
transgenic organisms
introduction to reproduction
renewable and non-renewable resources
air pollution and its effects
renewable and non-renewable sources of energy
wealth, capital and money
community health and hygiene
liver
plant breeding for food production
reading comprehension
oscillations
cell-the basic unit of life
drug, tobacco and alcohol consumption
p-block elements
pathogen and their mode of transmission
web 2.0
cryptogams
recording and posting of cash transactions
unemployment and employment generation
solar energy and its applications
digestion