The "red light" cherry in the northern residence of Laoshan Mountain is big, full, sweet and sour, and is very popular with people. (1) When Xiao Xia went to eat cherries in Laoshan Beiwu, he found th

The "red light" cherry in the northern residence of Laoshan Mountain is big, full, sweet and sour, and is very popular with people. (1) When Xiao Xia went to eat cherries in Laoshan Beiwu, he found the top of the tree. (1) Photosynthesis is essentially a process in which green plants use light energy to convert carbon dioxide and water into organic matter for energy storage and release oxygen. Make full use of light to enhance photosynthesis. The leaves at the top of the tree receive more light and photosynthesis is vigorous, so more organic matter is produced, and cherries are sweet.

(2) Compared with Part B, the experimental variable is light, starch turns blue when exposed to iodine, and area B turns blue, indicating that starch is produced in this area and can be used for photosynthesis, while area A remains blue, indicating that there is no starch produced in this area and cannot be used for photosynthesis. So this experiment shows that light is a necessary condition for photosynthesis.

(3) If it rains during the flowering of cherry trees, the pollen will be washed away by the rain, which will affect pollination, resulting in insufficient pollination of cherry trees and reducing the yield of cherry trees. In order to make up for the lack of pollination in the natural state, people often pollinate plants artificially; During the development and fruiting of ovary, ovule develops into seed and one ovule develops into seed.

(4) Grafting refers to grafting the buds or branches of one plant to another plant, so that the combined two parts grow into a complete plant. Grafted buds or branches are called scions, and grafted plants are called rootstocks. When grafting, the cambium of scion and rootstock should be closely combined to ensure survival. Grafting belongs to asexual reproduction, which has the advantages of maintaining the excellent characteristics of the mother and rapid reproduction. Grafting is often used to improve the varieties of fruit trees.

(5) Green plants can carry out transpiration, so that the water in plants can be emitted from the stomata of leaves in the form of water vapor, which increases the humidity of the atmosphere, takes away the heat in plants at the same time, lowers the temperature, and makes people feel moist and cool.

So the answer is: (1) organic matter (starch); (2)B； Light; (3) pollination; Ovule; (4) grafting; ⑤ Transpiration.