Down - Enters' Male- Petals Female Fertilized Seed. Tube. Fruit- Joins - PICK-SURE PERFECT Fertilization happens when a male sex cell 1 with the female sex cell. This happens when a 2. ___ grows out of the pollen grain. This tube is called pollen tube. It grows towards the 3.____ sex cell. A male sex cell moves 4. the tube. The tube 5c_ the female sex cell. The tip of the tube bursts open. The 6____ sex. cell joins with the fernale sex cell. The ovule then becomes 7 und it becomes a seed. The ovary grows in size as the inside it grows. As the ovary enlarges and ripens, it becomes a 9. As this process occurs, the 10. __of the flower wither and die. The ripened ovary is a fruit.