When doing mung bean seed experiment, the first one to break through the seed coat is: 1, 2 stems and 3 leaves.

When doing mung bean seed experiment, the first thing to break through the seed coat is the root.

The process of seed germination:

During germination, the seed first absorbs water and the seed coat swells. At the same time, the life activities in the embryo began to be active. After getting nutrition and energy from the cotyledons, it began to divide and grow: the radicle stretched out and stretched out the seed coat, developed into a root, and soon, some thin roots were born around this root; Since then, the embryo has developed into stems and leaves, and the hypocotyl has developed into a part connecting the stems and roots, so the radicle first breaks through the seed coat when the seeds germinate.