sample question paper 2020 21 class xii biology 044 theory time 3 hours maximum marks 70 general instructions i all questions are compulsory ii the question paper has four sections ...
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...Sample question paper class xii biology theory time hours maximum marks general instructions i all questions are compulsory ii the has four sections section a b c and d there in iii of mark each case based iv is no overall choice however internal choices have been provided some student to attempt only one alternatives such v wherever necessary neat properly labeled diagrams should be drawn why does endosperm development precede embryo how many meiotic divisions required produce seeds guava fruit pollination take place water hyacinth lily name glands that contribute human seminal plasma snapdragon plant with violet flowers was crossed another white f progeny obtained had pink explain brief inheritance pattern seen offsprings generation differentiate between aneuploidy polyploidy predict effect if codon uau coding for an amino acid at th position polypeptide acids mutated uaa pro insulin mature commonly used vector cloning genes into higher organisms which three forests temperate mangrov...