The figure shows the structure of broad bean (as shown in figure 1) and corn (as shown in figure 2) respectively. According to the figure, the answer is: (1) The structure of storing nutrients in broad bean seeds is _ In the figure, a hypocotyl, b radicle and c seed coat; E cotyledon, F seed coat (pericarp), G embryo, H hypocotyl, I radicle, K cotyledon, J endosperm.

(1) Nutrients of kidney bean seeds are stored in E cotyledons; The nutrients of maize seeds are stored in J endosperm.

(2) Broad bean seeds and corn seeds will germinate under suitable conditions. At the initial stage of germination, radicle B and radicle I grow fastest, and they first break through the seed coat and grow to roots.

(3) The radicle of Vicia faba seeds first breaks through the seed coat and develops into roots, then the hypocotyl elongates, and the D embryo breaks through the seed coat and grows into stems and leaves. Through this process, the embryo of the seeds develops into seedlings.

Therefore, the answer is: (1) e; J； （2）B； I； （3）B； D