Analysis of test questions: Fruit is an organ with pericarp and seeds formed by pistil or ovary with other flowering parts after pollination and fertilization of angiosperms. Seed is the structure of ovule growth after fertilization. From the options, sunflower seeds, wheat grains and corn grains are all fruits, while broad beans, mung beans, kidney beans, sesame seeds, watermelon seeds, peanut kernels and almonds are all seeds.

Comments: This topic is entitled Basic Knowledge. The key to solve this problem is to master that fruits, including peels and seeds, are developed from the ovary of pistils and can be recorded in combination with the fruit structure of plants.