The top part A of the flask-shaped reproductive organ X in the flower of a plant secretes a surgery substance into its lower part B which goes towards the bottom part C of the flask-shaped organ. When a tiny grain D coming from the top part E of another reproductive organ Y in the flower falls on part A, it grows a long tube F through the organ X in response to the sugary substance and reaches the bottom part C of flask-shaped organ to carry out fertilisation.
(a) What is (i) organ X, and (ii) organ, Y inside the flower?
(b) Name parts (i) A (ii) B, and (iii) C, of flask-shaped organ.
(c) Name (i) grain D, and (ii) part E of organ Y.
(d) Name the tube F.
(e) What is the phenomeon of growing a long tube in response to a sugary substance in the process of fertilisation in a flower known as?

Answer

(a) (i) Carpel (ii) Stamen (b) (i) Stigma (ii) Style (iii) Ovary (c) (i) Pollen grain (ii) Anther (d) Pollen tube (e) Chemotropism