List the main discoveries made in biology in the XX century.

In the middle of the XX century. the methods and ideas of other natural sciences began to actively penetrate into biology. Achievements of modern biology open up broad prospects for the creation of biologically active substances and new drugs, for the treatment of hereditary diseases and selection at the cellular level. Currently, biology has become a real productive force, the development of which can be used to judge the general level of development of human society.
– The discovery of vitamins
– Discovery of peptide bonds in protein molecules
– Study of the chemical nature of chlorophyll
– Described the main plant tissues
– Discovery of DNA structure
– Study of photosynthesis
– The discovery of a key stage in the respiration of cells – the tricarboxylic acid cycle, or the Krebs cycle
– Study of the physiology of digestion
– Observed the cellular structure of tissues
– Observed unicellular organisms, animal cells (red blood cells)
– Opening the nucleus in the cell
– Discovery of the Golgi apparatus – a cell organoid, a method for the preparation of microscopic preparations of nervous tissue, a study of the structure of the nervous system
– Found that some parts of the embryo have an impact on the development of its other parts
– Formulated a mutation theory
– Creation of a chromosome theory of heredity
– Formulated the law of homological series in hereditary variation
– Found an increase in the mutation process under the influence of radioactive radiation
– Discovered a complex gene structure
– Discovered the significance of the mutation process in processes occurring in populations for the evolution of a species
– Established the phylogenetic series of equidae as a type series of gradual evolutionary changes in related species
– Developed a theory of germ layers for vertebrates
– He put forward the theory of the origin of multicellular organisms from a common ancestor – the hypothetical phagocytella organism
– Substantiates the presence in the past of the ancestor of multicellular – phagocytella and suggests considering it a living model of a multicellular animal – trichoplax
– They substantiated the biological law “Ontogenesis is a brief repetition of phylogenesis”
– He wrote and published the work “Geographical Distribution of Animals” – a work that convincingly showed how great the significance of the genetic connection of extinct and modern fauna is
– He claimed that many bodies are multifunctional; in new environmental conditions, one of the secondary functions may become more important and replace the previous main function of the organ
– He put forward the hypothesis of the emergence of bilateral symmetry of living organisms.

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