When an insect sits on the flower of a plant then some particles A present in the top of little stalks in the flower attached to its body hair. When this insect now sits on the flower of another similar plant, then particles A attached to the hair of insect are put on the top of a flask-shaped organ at the centre of the flower. The particle, A grows a long tube B from the top of a flask-shaped organ through which C moves down and reaches the bottom part of the flask-shaped organ. Here C fuses with the nucleus of D contained in structure E. The fusion of C and D forms a new cell F which grows and develops into a seed of the plant. (a) What are particles A? What is the process of transferring A from one flower to another flower of the similar plant by the insect known as? (b) What is the name of tube B? (c) What is C which moves down through the tube B? (d) Name D and E. (e) What is F?