Shubhadeep Bhattacharjee

cbse neet biology classxii ncert diseases health sexual reproduction single cell proteins food crops animals strategy breeding production food human ecology lactation parturition physiology anatomy fertilization development endocrinology botany conservation stratgies conservation of biodiversity loss of biodiversity importance of biodiversity patterns of biodiversity conservation biodiversity ecosystem services nutrient cycle ecological successions ecological pyramids nutrient cycling energy flow decomposition productivity ecosystem welfare application microbiology class xii pathogens abuse alcohol drugs cancer aids immunology science