(2) The development of ovary after fertilization is as follows:
As can be seen from the figure, after fertilization, in the process of fruit formation, the ovule develops into a seed, the integument develops into a seed coat, the fertilized egg develops into an embryo, and the whole ovary develops into fruit.
Therefore, in folk customs, the homonym of lotus is called "Lotus gives birth to cinnamon". In fact, the lotus seed in the lotus is the seed of the lotus, which is developed from the ovule of the lotus. When eating lotus seeds, the peel is the seed coat, which is developed from the integument.
(3) Lotus can use seeds to breed offspring, and can also take seeds to far places with the help of water power to expand the scope of seed transmission.
So the answer is:
(1) stigma; Pollen tube; Ovary; Egg cell; Sperm;
(2) ovule; Seed coat; Beaded quilt;
(3) Hydraulic power.