A, in the process of plant growth and development, the terminal bud has a certain restriction on the lateral bud. When the terminal bud grows vigorously, the growth of lateral buds will be inhibited by excessive secretion of growth hormone, which is called apical dominance. If the terminal buds are removed, the lateral buds will soon develop into branches. In production practice, people often use the principle of plant apical advantage to trim, fork or core crops and fruit trees.
B. Transpiration refers to the process in which water in plants is emitted into the atmosphere in the form of water vapor through the stomata of leaves, which shows that leaves are the main body of transpiration. The root hairs and young roots of transplanted plants will be damaged to some extent, and the water absorption capacity will be reduced. Therefore, when transplanting plants, it is often necessary to cut off a large number of branches and leaves to reduce transpiration, reduce water loss, avoid wilting of transplanted plants and improve the survival rate of transplanted plants.
C, insulin can regulate blood sugar concentration, promote glycogen synthesis and accelerate blood sugar decomposition, thus keeping blood sugar concentration stable, so it does not meet the question.
D. Livestock castration is an operation invented by our ancestors in production practice. It is to remove the reproductive function of livestock and make it easy to serve and grow, so it is related to the secretion of animal sex hormones.
So choose: B.