In biology teaching, proper use of idioms can vividly explain some basic concepts and theories of biology, turn boring into vivid, and make students enjoy it.

Easy to accept and understand, so as to achieve twice the result with half the effort. The summary is as follows for your reference. Homogeneity-cell mitosis, characterized by chromosome replication and equilibrium. Under normal circumstances, no matter how many times a cell divides, the number of chromosomes remains unchanged, which ensures the stability of genetic traits of parents and children. Transformation-abnormal development in post-embryonic development, can form a completely different self from young faces in a short time. Divide into two-at the late stage of mitosis, the centromere divides and the number of chromosomes doubles. Flashy-boron deficiency in plants. When boron is deficient, pollen development is poor. Although plants bloom, they cannot pollinate and it is difficult to form seeds. Places and phenomena-cells divide constantly, and the morphology of chromosomes and chromatin changes. Hesitation-endocytosis and exocytosis are the ways in which macromolecules and granular substances enter and leave cells. Out of nothing-the substance of photosynthesis changes, and green plants can synthesize organic sugar from carbon dioxide and water (inorganic matter). Deep roots and lush foliage-Only deep roots can fully absorb water and mineral ions, make them participate in life activities to the maximum extent, and ensure the healthy growth of plants.

Rapid change-metabolism, that is, a large number of rapid chemical changes in organisms. Continuous flow-the circulatory system of higher animals and people, which is responsible for transporting various nutrients and metabolic wastes. With relish-the action of amylase in saliva can decompose starch into maltose, which makes taste buds feel sweet. Grafting-a way of vegetative propagation of plants. Cutting and grafting propagation of flowers and fruit trees. Self-destruction-the individual development of oviparous organisms. It means that after the embryo develops to a certain stage, the larvae break out of the shell and enter the post-embryonic development. Self-learning without a teacher-the natural behavior of animals. Including tropism, unconditional reflex and instinct. Six parents deny--the impression of animals' acquired behavior. For example, the newly hatched cygnet will follow the first big action target it sees (maybe not its parents). Scared bird-bird's conditioned reflex. Painting cakes to satisfy hunger-human conditioned reflex. Flowering and fruiting-seeds are formed after flowering and pollination, and the seeds produce auxin to promote fruit development. Demand is greater than supply-alienation is greater than assimilation. For example, hyperthyroidism in humans.

Words and deeds-the acquired behavior of higher animals and people, through learning and experience accumulation, enable individuals to better adapt to the environment and society. Stand out from the crowd-the top advantage of plants, that is, the phenomenon that the terminal buds are long and the lateral buds are suppressed. Apricot outside the wall-phototropism of plants. Auxin is distributed on the backlight side more than the light side, which makes the branches grow and bend to the light source side. Omission-In meiosis, the cross exchange of homologous chromosomes in tetrad period is the theoretical basis of complete linkage's inheritance law. Unique-the genetic material of every living thing. The fundamental cause of biodiversity on earth is genetic diversity. The good and the bad are mixed gene mutations. Mutation is non-directional, which can produce both harmful and beneficial mutations. Be swayed by considerations of gain and loss-variation of chromosome number. For people, there are genetic diseases such as gonadal dysplasia (one X chromosome is missing) and congenital idiot (one more chromosome 2 1). Domestic troubles and foreign invasion-struggle for existence. Dead wood meets spring-the influence of ecological factors such as temperature on living things. Biting hands for others —— Parasitic phenomenon in interspecific relationship. Law of the jungle-predation in interspecific relations.

Imitation is effective. I'm not myself. Relativity of self-restraint-adaptation. Clan confrontation differences-intraspecific mutual assistance and interspecific struggle. Killing each other-intraspecific struggle. Qi Xin cooperation-intraspecific mutual assistance. Mourning everywhere-the harm of environmental pollution to living things. Quench thirst by drinking poison-the harm caused by water pollution. If it is not treated in time, people will suffer the consequences. Surviving the robbery-in animal cell culture, after primary culture, subculture and two robberies, individual cells may become cancer cells and become "immortal cells". Creepy-sympathetic nerves are excited, skin hairy muscles contract, and skeletal muscles tremble involuntarily. Self-sufficiency-autotransplantation. Such as skin transplantation, can reduce the rejection caused by histocompatibility antigen. Meet in a narrow way-fertilization. That is, sperm and egg cells meet and combine in the ampulla of fallopian tube to form fertilized eggs. A thousand miles away-the submicroscopic structure of cells and the structural differences between various organelles determine the uniqueness of their functions. The mantis catches the cicada, and the yellowbird is behind-the food chain in the ecosystem.

Those who follow me prosper and those who oppose me perish-natural selection. That is, the survival of the fittest and the elimination of the unsuitable. Close to Zhu Zhechi, close to the ink is black-protective color. I'm not here. Share joys and sorrows, live and die together —— Symbiosis in interspecific relations. Drive fish for the garden and birds for the forest-establish nature reserves to give rare creatures a foothold and a place of their own. Stones from other mountains can attack jade-transgenic technology. For example, scientists in China introduced the insect-resistant gene of a certain bacterium into cotton, and cultivated a new cotton strain with obvious resistance to cotton bollworm. Every living thing in the food chain has its important position. When the number of a creature changes, the whole food chain will be affected.