1) Units of heredity a) Bacteria b) Reproduction c) Genes d) Human evolution 2) Science of heredity is known as a) Genetics b) Embryology c) Biochemistry d) Biology  3) Number of chromosomes in human body a) 24 pais b) 26 pairs c) 23 pairs d) 20 pairs  4) Who gave theory of natural selection? a) Mendel b) Charles Darwin c) Robert Hook d) None of above 5) Parents with 'AB' and 'O' blood group can have children of a) 'A' blood group b) 'O' blood group c) 'AB' blood group d) 'A'or 'B' blood group

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