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Test question analysis: The structure of mung bean seeds includes radicle, embryo, hypocotyl, cotyledon and seed coat. The seed coat plays a protective role, and the embryo It will develop into stems and leaves in the future, the embryo will develop into roots in the future, and the hypocotyl will develop into the part connecting the roots and stems. When the seed germinates, the radicle of the embryo first grows and elongates, protruding the seed coat and developing into a young root. , the hypocotyl below the cotyledons grows rapidly and develops into a white tender part connecting the root and the stem, while the embryo sandwiched between the two cotyledons has almost no obvious growth. The bean sprouts we eat are mainly the white part, the hypocotyl. .

Comments: This question is a basic question with average difficulty. To answer this question, you need to clarify the structure and future development of the seed.