ncert class 12 biology syllabus class xii theory total periods 180 i reproduction periods 35 reproduction in organisms reproduction a characteristic feature of all organisms for continuation of species modes ...
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...Ncert class biology syllabus xii theory total periods i reproduction in organisms a characteristic feature of all for continuation species modes asexual and sexual binary fission sporulation budding gemmule fragmentation vegetative propagation plants flowering flower structure development male female gametophytes pollination types agencies examples outbreedings devices pollen pistil interaction double fertilization post events endosperm embryo seed formation fruit special apomixis parthenocarpy polyembryony significance human reproductive systems microscopic anatomy testis ovary gametogenesis spermatogenesis oogenesis menstrual cycle fertilisation upto blastocyst implantation pregnancy placenta elementary idea parturition lactation health need prevention sexually transmitted diseases std birth control methods contraception medical termination mtp amniocentesis infertility assisted technologies ivf zift gift general awareness ii genetics evolution heredity variation mendelian inheritanc...