The picture shows the fertilization process of angiosperms. Please answer the following questions according to the pictures. (1) The anthers of stamens will naturally divide and release _ _ _ _ _ _ _.

Solution: (1) According to the analysis, the L in the figure refers to pollen, which naturally divides and releases after the anther matures, and the process of falling on the stigma of pistil [2] is called pollination.

(2), (3) Figure 5 is a pollen tube. Pollen germinates and grows after being stimulated by stigma mucus, and extends into the ovule, so that sperm and egg cells combine to complete fertilization. After fertilization, only the ovary continues to develop, and finally the ovary develops. The development situation is shown in the following figure: So the ovary develops as a result, and the ovules inside develop into seeds.

So the answer is: (1)[ 1] pollen; [2] Stigma

(2)[5] pollen tube [4] sperm

(3) Fruit