(i) The type of gene, which in the presence of a contrasting allele, is not expressed.   (ii) The vaccine that helps to produce immunity against Polio.   (iii) The canal through which the testes descend into the scrotum just before birth in a human male child.   (iv) The duct which carries urine from the urinary bladder to outside the body.   (v) The bacteria which carries out the process of nitrification.   (vi) The respiratory pigment present in Erythrocytes   (vii) The tissue that transports manufactured starch from the leaves to all parts of the plant.   (viii) The structure where photophosphorylation takes place.