Book excerpt: Quantum biology is a wide area of research closely connected with almost all parts of biology. It is based on experimental data of biological sciences and the fundamental laws of physics (de Broglie law of corpuscular-wave dualism of the matter, the conservation laws, including the laws of thermodynamics). At this time, our knowledge in this area is fragmentary. The usual corpuscular biology studies only one plane of living matter organisation, the structure and function of which is determined by the DNA-particle. That is why the theory often does not agree with experience, the physics laws dont work. It leads to frequent changes of concepts. Many phenomena (division of living matter into cells, restoration and loss of totipotency of cell systems, etc.) do not find an explanation within the corpuscular theory framework. This book includes nine chapters.In Chapter 1 the insight of a cell as a quantum-mechanical system, an equilibrium system, an open and closed system; the notion of biological harmonic oscillator, as an elementary and indivisible unity of the wave properties of a living matter; the principle and regimes of oscillator work in plants; two internal energy sources and their physical nature; the role of DNA-particles and DNA-wave at different hierarchical levels of living matter organisation are discussed. In Chapter 2 the changes of DNA particles, DNA-waves, the cell physical state, its basic components and physiological functions are analysed during cell cycle of proliferating plant cell. In Chapter 3 seven types of cell division (mitosis, differentiative mitosis, free-nucleus mitosis, meiosis, endomitosis, crushing and promitosis) are described. The dependence of the principle of prokaryotic and eukaryotic cell development from its condition is shown in Chapter 4. In Chapter 5 physical models of gamete sexual differentiation and fertilisation are considered. The manifestation of the low of total impulse conservation in evolution processes is examined in Chapter 6.In Chapter 7 the mechanisms and manners of biological protection and the reasons for their change during evolution are discussed. How and why a DNA-particle and a DNA-wave change during reproductive development of future plant initial cells is described on Pinus sylvestris L. example in Chapter 8. In Chapter 9 a short overview of quantum biology tasks and problems is given.