(1, ***5) Corn is an important food crop in our city. The figure below shows the structural hierarchy of maize plants. Please answer according to the picture: (1) One cell.

(2) Meristem; Split to form other new organizations.

(3) organs; As much as ...

Analysis of test questions: (1) Cells divide to produce new cells, and the newly formed cells grow up. Slowly, some cells lost the ability to divide and began to differentiate, forming a cell group with the same shape, structure and function. This shows that the formation of tissue is the result of cell differentiation.

(2) The plant meristem is characterized by small cells, large nucleus, thick cytoplasm and thin cell wall, which can divide and produce other new tissues. It can be seen that B3 is a meristem.

(3) Organs are the result of different tissues with certain physiological functions arranged in a certain order. Corn kernels are composed of different tissues such as protective tissues and nutritional tissues. Corn kernels have reproductive physiological functions, so corn kernels belong to organs. In the process of fruit and seed formation, the fertilized egg develops into the embryo of the seed, and the ovary wall develops into the fruit skin. The whole ovary develops and bears fruit.

Test site: Cells differentiate into tissues; Structural levels of plants.